Exxоn Chemical Patents, Inc., Exxon Corporation, and Exxon Research & Engineering Co. (collectively “Exxon”) appeal from the district court’s denial of their motion for a new trial in a patent infringement action that Exxon brought against The Lubrizol Corporation. Exxon filed the motion for a new trial on infringement under the doctrine of equivalents after this court reversed an earlier jury verdict in Exxon’s favor on literal infringement.
See Exxon Ch
em.
Patents, Inc. v. Lubrizol Corp.,
I
This appeal is another chapter in a lengthy and expensive patent litigation between Exxon and Lubrizol. Exxon is the owner of U.S. Patent No. 4,867,890, which is directed to a lubricant for automobile engines. Exxon filed suit against Lubrizol for patent infringement оn the day the patent issued, September 19, 1989. Following extensive discovery and a ten-day trial, the jury returned a verdict in Exxon’s favor. The jury verdict addressed only literal infringement. Exxon had deleted its proposed jury instruction on infringement under the doctrine of equivalents following the decision of the district judge to adopt Exxon’s proposed claim construction. After the district court denied Lubrizol’s motion for judgment as a matter of law, Lubrizol appealed to this court.
On appeal, this court rejected the claim construction proposed by Exxon and adopted a construction basеd on the one proposed by Lubrizol.
See Exxon Chem. Patents, Inc.,
The majority and dissenting opinions briefly addressed the question whether Exxon should be granted a new trial on infringement under the doctrine of equivalents. Judge Nies argued that Exxon was entitled to a new trial in light of the new claim construction adopted by the panel.
See
Exxon petitioned for rehearing. Although Exxon’s petition was devoted to arguing the merits of its preferred claim construction, Exxon also requested, “out of an abundance of caution,” that the panel clarify its opinion regarding Exxon’s right tо move for a new trial on doctrine-of-equivalents infringement. Exxon’s petition was denied without the requested clarification.
Exxon subsequently filed a motion in the district court for a new trial on infringement under the doctrine of equivalents. The district judge denied the motion in a one-page order, stating that the court’s decision left him with “no authority to grant a new trial.” Exxon now appeals from that order, arguing that although our reversal of the jury verdict foreclosed any further proceedings relating to literal infringement, our mandate did not preclude the district court from entertaining a motion for a nеw trial on the issue of *1478 infringement under the doctrine of equivalents.
II
A
This court’s opinion in the prior appeal construed the claims of the patent and analyzed the issue of literal infringement. At the conclusion of the analysis of those issues, the court reversed the jury verdict and held that Lubrizol was “entitled to a judgment of noninfiringement as a matter of law.” The court further stated that its reversal was “without remand for a second trial.”
Those statements in the court’s opinion referred only to the issue of literal infringement. Any suggestion that the court meant to address the issue of infringement under the doctrine of equivalents is put to rest by the first footnotе of the opinion, in which the court explained that the judgment under review was “limited to literal infringement.”
Even without the express disclaimer in the court’s opinion, it would be incorrect to conclude that the court’s mandate encompassed an issue that was not presented to the court. Although in some cases issues not explicitly addressed by an appellate court may nonetheless be decided by necessary implication, see 18 James Wm. Moore, Moore’s Federal Practice § 134.23[4] (3d ed.1997), this is not one of those eases. This court’s opinion dealt only with the issues of claim construction and literal infringement. Resolution of those two issues did not requirе consideration of the doctrine of equivalents.
Our recent decision in
Laitram Corp. v. NEC Corp.,
Although this case involves an appeal from the denial of a JMOL motion, the same principle is applicable: in determining that Lu-brizol did not literally infringe Exxon’s patent, this court did not dispоse of Exxon’s doctrine-of-equivalents infringement claim; in fact, the court made clear that it was not addressing that issue. The mandate therefore cannot be interpreted as resolving the doctrine-of-equivalents claim, and for that reason the mandate does not foreclose the district court from addressing it.
B
Contrary to Lubrizol’s suggestion, Exxon cannot be charged with having aban
*1479
doned its doctrine-of-equivalents theory of liability by not submitting it to the jury or raising it on the previous appeal. Once the district judge construed the claim language in Exxon’s favor, the doetrine-of-equivalents issue in the сase became moot. Exxon could not realistically be expected to request alternative jury instructions asking for an advisory verdict on whether the patent would be infringed under the doctrine of equivalents on Lubrizol’s proposed claim construction. Nor could Exxon, as appellee, have been expected to defend the judgment in its favor on the basis of a theory of liability that was never given to the jury.
See Laitram Corp.,
Ill
Lubrizol argues that because Exxon asked for clarification of its right to move for a new trial on infringement under the doctrine of equivalents in its rehearing petition and got no response from this court, the court’s denial of the rehearing petition reflects a decision that Exxon was not entitled to a new trial.
No inferences can be drawn from the court’s silence in response to Exxon’s request for clarification. Courts normally do not respond to petitions for rehearing and it would be a mistake to conclude that a court’s non-response to an argument made in a rehearing petition necessarily means that the court has rejected that argument on the merits. The inference that this court meant to rule on the merits of the new trial issue is particularly suspect in this case, since all that was presented to the court was a request for clarification. The court’s failure to grant a request for clarification could well reflect the view that clarification was not required, rather than an intention to reject on the merits the legal argument on which Exxon sought clarification.
See Laitram Corp.,
Lubrizol cites to
Fine v. Bellefonte Underwriters Insurance Co.,
Other courts have agreed that the denial of a rehearing petition does not constitute a decision on the merits of whether the losing party may obtain a new trial on remand. In
United States v. Cote,
IV
Quite apart from whether this court’s mandate was intended to exclude a new trial under the doctrine of equivalents, Lubrizol contends that Exxon’s failure in the prior appeal to secure a remand for consideration of a new trial on that theory of liability bars it from presenting its request for a new trial to the district court. As support for that position, Lubrizol relies on the Supreme Court’s decision in
Neely v. Martin K. Eby Construction Co.,
A
We do not read Neely as establishing the broad rule that Lubrizol advocates. In Neely, the plaintiff won a jury verdict in a tort action, and the defendant unsuccessfully sought judgment n.o.v. on the ground that the evidence was insufficient to support the verdict. The court of appeals, however, reversed the judgment of the district court and remanded “with instructions to dismiss the action.” The plaintiff sought certiorari, contending that the court of appeals’ action violated Rule 50(d), Fed.R.Civ.P., and the Seventh Amendment. According to the plaintiff, the court of appeals was required to remand the case to the district court to allow that court to determine whether to grant a new trial.
The Supreme Court held that it was not error for the court of appeals to direct entry of judgment for the defendant rather than remanding the case for the district court to consider whether to grant a new trial. The Court noted that there were many circumstances in which it would be error for а court of appeals to direct the entry of final judgment for the defendant, but the Court refused to adopt “an ironclad rule that the court of appeals should never order dismissal or judgment for defendant when the plaintiffs verdict has been set aside on appeal.”
As an example of a case in which it would be improper for the court of appeals to order judgment notwithstanding the verdict, the Court pointed to
Weade v. Dichmann, Wright & Pugh, Inc.,
The Court referred to two categories of cases in which it would sometimes be appropriate for the court of appeals to enter judgment. First, where an appellant shows a defect in subject matter jurisdiction or entitlement on a dispositive issue of law, “there can be no reason whatsoever to prevent the court of appeals from ordering dismissal of the action or the entry of judgment for the defendant.”
Addressing the situation in which a court of appeals sets aside a jury’s verdict because the evidence was insufficient to send the case to the jury, the Court noted that even in that class of cases, there are some instances in which the plaintiff is entitled to a new trial rather than having a final judgment entered against it. Nonetheless, the Court observed, the new trial issues presented by those cases are typically ones that the district court has no special advantages or competence in dealing with, and thus the plaintiff may bring those issues directly to the court of appeals without moving for a new trial in the district court. In such cases, the Court noted, “the record in the court of appeals will very likely be a full one.”
In such cases, the Court explained, if the appellee presents the grounds for a new trial in its brief or petition for rehearing, the court of appeals “may make final disposition of the issues presented, except those which in its informed discretion should be reserved for the trial court.”
Turning to the facts of the case before it, the Court noted that the issue before the court of appeals was the sufficiency of the evidence and that the petitioner, as appellee, had “suggested no grounds for a new trial in the event her judgment was reversed, nor did she petition for rehearing in the Court of Appeals, even though that court had directed a dismissal of her case.”
Neely
thus stands for the proposition that in an appropriate case a court of appeals may direct that judgment be granted against an appellеe without permitting the appellee to seek a new trial from the district court. The earlier panel decision in this case did exactly that with respect to Exxon’s literal infringement claim. But the fact that the appellate court has the power to foreclose further proceedings in the district court does not imply that its judgments have that effect even when the court does not so direct.
Neely
explicitly tied the exercise of the appellate court’s power to direct the entry of final judgment against the verdict-winner to the court’s ability to make an informed judgment bаsed on the record before it. Only in those circumstances would a decision by the court of appeals directing the entry of final judgment “serve the purpose of Rule 50 to speed litigation and to avoid unnecessary retrials.”
*1482
The
Neely
Court noted that Rule 50(d) was “not intended to ‘alter the effects of a jury verdict or the scope of appellate review.’”
The Fifth Circuit’s decision in
Conway v. Chemical Leaman Tank Lines, Inc.,
B
Neely is distinguishable from this case in another important respect. In the fact situation presented in Neely, the Supreme Court found that the burden on the appellee to raise its new trial issues before the court of appeals was small. In other settings, the Court recognized, the burden would be much greater, and in those cases it would be inappropriate for the court of appeals to direct the dismissal of the appellee’s complaint without giving the appellee an opportunity to present its new trial arguments to the district court. This case clearly falls in the latter category.
Rather than promoting judicial economy, the rule that Lubrizol proposes would place undue additional burdens both on the parties and on the appellate court. An appellee cannot be expected to preserve all issues that might conceivably give rise to a motion for a new trial, including those issues unrelated to the subject of the appeal. In a case that turns on claim construction, Lubrizol’s rule would require an appellee to anticipate every possible claim construction that the appellate court might adopt and put forth grounds for a new trial under each possible claim construction. As a practical matter, the first opportunity that a party in Exxon’s position would have to make its arguments for a new trial would be in a petition for rehearing, and rehearing petitions are normally not a suitable vehicle for making new arguments to the appellate court.
See Pentax Corp. v. Robison,
We do not mean to imply that the motion for a new trial presented to the district court in this case is necessarily meritorious. Assessing the mеrits of the new trial motion is for the district court. We are unequipped on this record to make any substantive judgments regarding the merits of Exxon’s doctrine-of-equivalents infringement claim. For that reason, we do not accept Lubrizol’s invitation to affirm the district court’s order on the ground that Exxon has not shown a basis for a new trial on its doetrine-of-equivalents theory; we leave to the district court the questions whether Exxon is entitled to a new trial on that theory and whether there is any procedural flaw in Exxon’s motion that would prevent the district court from considering the motion on its merits. We simply hold that our prior mandate did not deprive the district court of the authority to entertain the motion and that nothing in the Supreme Court’s decision in Neely compels a contrary conclusion.
V
As a final matter, we address the significance of the formal judgment issued with the earlier Exxon opinion. The operative language of the judgment consisted of the single word “reversed.” Lubrizol attaches significant weight to the omission of the words “and remanded” from that judgment. According to Lubrizol, a judgment of reversal, standing alone, precludes any additional proceedings in the district court, and that only a judgment expressly providing for a remand contemplates that the district court still has tasks to fulfill.
Interpretation of an appellate mandate entails more than examining the language of the court’s judgment in a vacuum.
See
Fed. R.App. P. 41(a) (appellate court’s mandate includes both the judgment and the opinion of the court). As an initial matter, every appellate court judgment vests jurisdiction in the district court to carry out some further proceedings. In some cases, those further proceedings may be purely ministerial, as when a judgment for the plaintiff is reversed and the only matters that remain for the district court are to dismiss the complaint and enter thе judgment in the docket. Frequently, however, the disposition of a case in the court of appeals will require the district court to undertake more significant proceedings. In either ease, the nature of the district court’s remaining tasks is discerned not simply from the language of the judgment, but from the judgment in combination with the accompanying opinion.
See In re Sanford Fork & Tool Co.,
A case from the Supreme Court dealing with the mandate rule illustrates the point perfectly. In
Sprague v. Ticonic National Bank,
The Ninth Circuit recently dealt with the same issue in
United States v. Cote,
On appeal from the denial of the new trial motion, the Ninth Circuit reversed. The court held that the absence of a specific remand directive did not bar the district court from ordering a new trial, as long as the new trial would not be inconsistent with the mandate of the earlier opinion as gleaned from the judgment together with the accompanying opinion.
Cote reaffirms the general rule that, following appellate disposition, a district court is free to take any action that is consistent with the appellate mandate, as informed by both the formal judgment issued by the court and the court’s written opinion. The exclusion of an explicit remand in the first Exxon opinion was correct as it pertained to the issue on appeal, i.e., literal infringement, and the mandate prohibited the district court from granting a new trial on that issue. Read in light of the accompanying opinion, however, the judgment did not deprive the district court of authority to consider Exxon’s motion for a new trial on infringement under the doctrine of equivalents.
VACATED and REMANDED.
