Bradford-Scott Data Corporation agreed to sell some computer software written by VERSYSS Incorporated. The parties entered into two contracts, the Vertical Value-Added Reseller (VAR) Agreement and the Master License Agreement. Later VER-SYSS was acquired by Physician Computer Network (PCN), which offers a software package competing with the VERSYSS package Bradford-Scott licensed. Bradford- *505 Scott then filed this suit, contending that the acquisition and some of its subsequent conduct placed VERSYSS in violation of its obligations under the Master License Agreement. Bradford-Scott asked the district court to issue a preliminary injunction, which the judge declined to do; the court also, held that Bradford-Scott is not required to arbitrate this dispute. The VAR Agreement contains a broad arbitration clause, covering “any dispute or controversy between the parties ... relating to this Agreement”; the Master License Agreement has a narrow arbitration clause covering only “payments disputéis] concerning license or support fees”. The district judge thought that the two clauses conflict, and he applied the clause in the Master License Agreement because Bradford-Scott’s claims are based on that agreement rather than the VAR Agreement. The district court’s conclusion that the dispute is not arbitrable led it to deny the request to stay the litigation under 9 U.S.C. § 3. PCN and VERSYSS immediately appealed on the authority of 9 U.S.C. § 16(a)(1)(A), which permits an appeal from any order “refusing a stay of any action under section 3 of this title”. The district court refused to stay discovery and trial pending appeal; PCN and VERSYSS now ask us for that relief.
The district judge’s only reason — • that he need not stay proceedings pending appeal, because he had not entered an appealable order — is untenable. The judge did not mention § 16(a)(1)(A), which authorizes appellate review in cases of this kind. For their part, the parties have approached the issue as if appellants were seeking a stay.of an injunction, rather than a delay in proceedings. To obtain a stay of a district court’s judgment, the appellant must establish irreparable harm and a significant probability of success on the merits, against a background norm that appellate courts are reluctant to disturb decisions in advance of full review. Judged by this standard, appellants’ request would fail at the outset, for the costs of litigation are not irreparable injury.
FTC. v. Standard Oil Co.,
We approach the subject from a different perspective, however, asking not whether appellants have shown a powerful reason why the district court must halt proceedings, but whether there is any good reason why the district court may carry on once an appeal has been filed. For it is fundamental to a hierarchical judiciary that “a federal district court and a federal court of appeals should not attempt to assert jurisdiction over a case simultaneously. The filing of a notice of appeal is an event of jurisdictional significance — it confers jurisdiction on the court of appeals and divests the district court of its control over those aspects of the case involved in the appeal.”
Griggs v. Provident Consumer Discount Co.,
Section 16 of the Federal Arbitration Act replaces the unlamented
Enelow-Ettelson
doctrine, which was overruled by
Gulfstream Aerospace Corp. v. Mayacamas Corp.,
Without citing
Lummus,
two courts of appeals have refused to issue stays while § 16(a) appeals were under consideration.
In re Salomon Inc. Shareholders’ Derivative Litigation,
Abney, Apostol,
and
Goshtasby
all were interlocutory appeals raising the question whether discovery and trial should proceed— in
Abney
the appellant contended that trial would violate the double jeopardy clause, in
Apostol
that trial would be incompatible with public officials’ immunity from suit, and in
Goshtasby
that the eleventh amendment prevented the district court from exercising jurisdiction. Each kind of claim,
Apostol
and
Goshtasby
explain, is inconsistent with continuation of proceedings in the district court, and that the notice of appeal accordingly brings those proceedings to a halt
unless the appeal is frivolous. '
Either the court of appeals or the district court may declare that the appeal is frivolous, and if it is the district court may carry on with the case.
Apostol,
Bradford-Scott does not argue that the appeals are frivolous. Nor does it argue that any individual claim against PCN and VERSYSS is clearly non-arbitrable, making it unnecessary to decide whether a district court could proceed on such a claim even when an appeal confined to a different claim is non-frivolous. Bradford-Scott does observe that PCN and VERSYSS are only two among the four defendants, and that the case may proceed against the others. True enough, see
IDS Life Insurance Co. v. Sun-
*507
America, Inc.,
