Acoustic Systems, Inc. (“Acoustic”) brought this antitrust suit, 15 U.S.C. § 1, et seq., against the defendants, Wenger Corporation and its employee Steve Bright (collectively “Wenger”) in district court. Wenger moved unsuccessfully for summary judgment upon both the state action and the Noerr-Pennington doctrines and appealed. We dismiss the appeal for lack of appellate jurisdiction. The denial of a summary judgment motion based upon the Noerr-Pennington doctrine is not a collateral order within this court’s appellate jurisdiction. The denial of a summary judgment motion premised upon the state action doctrine asserted by a private defendant is not a collateral order within this court’s appellate jurisdiction.
I. FACTS and PROCEDURAL HISTORY
Wenger and Acoustic competitively manufacture and sell modular music practice rooms to schools, universities, and other entities. Wenger at one time was the sole manufacturer of modular music practice rooms. Acoustic is a relative newcomer to the market.
*289 Acoustic alleges that Wenger has endeavored to protect its 90 percent share of the modular music practice room market by engaging in anticompetitive conduct. Acoustic alleges that Wenger’s near monopoly enables it to persuade architects and builders to use specifications calling for the unique features of Wenger modular practice rooms. Thus, the specification process is an extensive barrier to Acoustic’s entry into the market. Acoustic also alleges that Wenger interferes with Acoustic’s existing and prospective contractual relations by false disparagement of Acoustic’s products and false representations that Acoustic has infringed upon a Wenger patent. Wenger allegedly focuses its anti-competitive conduct upon public and private universities and public school districts, as well as at private architects and general contractors in charge of public school construction projects.
Acoustic filed suit in May 1997 alleging that Wenger had engaged in unfair and anticompetitive business practices against Acoustic including monopolization, predatory pricing and price discrimination, per se tying and restraint of trade, use of fraudulent patent, patent misuse, tortious interference with contract, commercial defamation, and false description and unfair competition. 1
Pursuant to a Wenger motion to dismiss, the district court dismissed two patent related claims (Counts IV and V), and they form no part of this appeal. In August 1998 Wenger moved for summary judgment dismissal of all 16 claims then pending: five relating to antitrust under the Sherman and Clayton Acts, one for false patent marking, one for violation of Texas public procurement laws (Texas Education Code § 44.031 et seq.), and nine for business torts.
The district court granted summary judgment in favor of Wenger dismissing the state procurement law claim but denied Wenger’s summary judgment motion as to the remaining 15 claims. On January 19,1999, Wenger timely appealed from the partial denial of summary judgment asserting the collateral order exception to the final judgment rule on grounds that the summary judgment motion was based on the state action and Noerr-Pennington doctrines. Acoustic contends that we lack appellate jurisdiction to consider this appeal because, in the context of this case involving a private defendant, neither the state action doctrine nor the Noerr-Pen-nington doctrine operates to confer immediate appealability on the interlocutory order issued by the district court.
II. ANALYSIS
Before proceeding further, we must determine whether we have appellate jurisdiction.
See Simmons v. Willcox,
Title 28 U.S.C. § 1291 provides for appeal from “final decisions of the district courts.” Under that provision, an appeal may not be taken “ ‘from any decision which is tentative, informal, or incomplete,’ as well as from any ‘fully consummated decisions, where they are but steps towards final judgment in which they will merge.’ ”
Puerto Rico Aqueduct and Sewer Authority v. Metcalf & Eddy, Inc.,
Wenger asserts that an order denying a summary judgment motion premised upon either the state action or the Noerr-Pen-nington doctrine is immediately appealable under the collateral order doctrine. We conclude, however, that, while both doctrines afford a defense to liability, the state action doctrine does not provide an immunity to suit to a private party, and the Noerr-Pennington doctrine does not provide anyone a right not to stand trial. Consequently, the district court’s denial of Wenger’s motion for summary judgment is not an appealable collateral order. 2
1. State Action Doctrine
In
Martin v. Memorial Hospital at Gulfport,
In
Martin,
a nephrologist brought an antitrust action against a public hospital, owned and operated by a municipality and a state subdivision hospital district, and against the hospital’s board of trustees to enjoin the enforcement of the hospital’s contract with the medical supervisor of its End Stage Renal Disease facility.
See
Wenger argues that a private party seeking immunity from antitrust suit and liability under the state action doctrine should also be permitted to appeal immediately from a denial of summary judgment on these issues within the collateral order exception. Wenger has not cited, and we are not aware of, any decision to this effect.
In determining whether to expand the collateral order exception to include the present case, we are mindful of the Supreme Court’s admonition that it is but “a narrow class of collateral orders which do not meet this [traditional] definition of finality, but which are nevertheless immediately appealable under § 1291.... ”
Quackenbush v. Allstate Ins. Co.,
“[W]hen we assess whether interlocutory review is appropriate, ‘[t]he critical question ... is whether the essence of the claimed right is a right not to stand trial.’ ”
Shanks v. AlliedSignal, Inc.,
169 F.Bd 988, 991-92 (5th Cir.1999)(citing and quoting
Van Cauwenberghe v. Biard,
Applying the foregoing precepts, we conclude that the state action doctrine does not immunize private defendants from suit and that the collateral order doctrine does not confer appellate jurisdiction over this appeal. The state action doctrine was first espoused by the Supreme Court in
Parker v. Brown,
“In subsequent cases, the Court extended the state action doctrine to cover, under certain circumstances, acts by private parties that stem from state power or authority.”
Martin,
On the other hand, municipalities and other political subdivision's, while they are not automatically immune under
Parker
because they are not sovereign, see
Town of Hallie v. City of Eau Claire,
In
Martin,
we concluded that the state action doctrine offered the public hospital defendant an immunity from suit' after comparing it to claims by public officials to absolute and qualified immunity and to claims by states to Eleventh Amendment immunity.
See Martin,
Because state action immunity was premised upon the
Parker
Court’s finding that “nothing in the language of the Sherman Act or in its history [ ] suggests that its purpose was to restrain a
state
or its
officers
or
agents
from activities- directed by its legislature,”
Parker,
Wenger’s status as a private defendant does not implicate these concerns. The
Parker i). Brown
state action doctrine, like the doctrine of qualified immunity, is “interpreted to create an immunity from suit
*294
and not just from judgment — to spare state officials the burdens and uncertainties of the litigation itself as well as the cost of an adverse judgment.”
Segni v. Commercial Office of Spain,
Wenger’s invocation of the state action doctrine, if meritorious, provides only a defense against liability. Accordingly, the denial of the summary judgment motion based on the state action doctrine is effectively reviewable after trial and is not an immediately reviewable collateral order. We therefore do not have appellate jurisdiction to review this aspect of the district court’s order.
2. Noerr-Pennington Doctrine
We are no more persuaded by Wenger’s contention that the district court’s denial of its summary judgment asserting a defense based on the
Noerr-Pennington
doctrine should be immediately reviewable on appeal under the collateral order doctrine. That defense against antitrust liability was established by the Supreme Court in the
Noerr-Pennington
cases, holding that, as a general rule, lobbying and other efforts to obtain legislative or executive action do not violate the antitrust laws, even when those efforts are intended to eliminate competition or otherwise restrain trade.
See Eastern R.R. Presidents Conference v. Noerr Motor Freight, Inc.,
The courts have based the
Noerr-Pen-nington
protection for petitioning governmental entities on the First Amendment right of citizens to petition the government and to participate in the legitimate processes of government.
See, e.g., Bill Johnson’s Restaurants, Inc. v. NLRB,
461 U.S.
*295
731, 741,
Correspondingly, the
Noerr-Pennington
doctrine also reflects the view that Congress did not intend the Sherman Act to reach governmental action or the political process.
See Noerr Motor Freight Inc.,
Although the
Noerr-Pennington
doctrine is frequently referred to as an “antitrust immunity,” it provides only a defense to liability, not an immunity from suit.
See We, Inc. v. City of Philadelphia,
First, the Supreme Court in
McDonald v. Smith,
Second, the courts which have recognized that the denial of a defense based on the state action doctrine of
Parker v. Brown,
Accordingly, we find the reasoning of the Third and Seventh Circuits convincing and conclude that, because the Noerr-Pen-nington doctrine provides only an affirmative defense against liability, not a right not to stand trial, a district court judgment denying summary judgment asserting the Noerr-Pennington defense is not an ap-pealable collateral order.
III. CONCLUSION
For lack of appellate jurisdiction, we dismiss Wenger’s appeal from the district court’s order denying summary judgment.
Notes
. Acoustic’s amended complaint contained the following counts of anticompetitive conduct and business torts: Count I (attempted monopolization, 15 U.S.C. § 2 (Sherman Act)); Count II (predatory pricing and price discrimination, 15 U.S.C. §§ 22(A) & 13(A) (Clayton Act)); Count III (per se tying and restraint of trade, 15 U.S.C. § 1 (Sherman Act)); Count IV (declaratory judgment of patent invalidity); Count V (patent misuse); Count VI (false patent marking, 35 U.S.C. § 292); Count VII (attempted monopoliza tion — Walker Process antitrust, 15 U.S.C. § 2 (Sherman Act)); Count VIII (attempted mo nopolization — Kobe antitrust, 15 U.S.C. § 2 (Sherman Act)); Count IX (tortious interference with contractual relations); Count X (tortious interference with prospective business relations); Count XI (commercial defamation); Count XII (per se trade slander and libel); Count XIII (false description and unfair competition, 15 U.S.C. § 1125); Count XIV (violation of Texas Public School Contract Statute); Count XV (common law unfair competition); Count XVI (injury to business reputation, Tex. Bus. & Com.Code § 16.29); Count XVII (unfair practices, Tex. Bus. & Com.Code § 15.05); and Count XVIII (conspiracy). '
. Because we conclude that the district court’s order denying summary judgment is not an immediately appealable collateral order, it is neither necessary nor appropriate to decide whether exclusive appellate jurisdiction would otherwise lie in the Federal Circuit under 28 U.S.C. § 1295 due to Acoustic’s
Walker Process, Kobe
antitrust, and false patent marking claims.
See Scherbatskoy v. Halliburton Co.,
. Though the state action doctrine is often labeled an immunity, that term is actually a misnomer because the doctrine is but a recognition of the limited reach of the Sherman Act which does "not undertak[e] to prohibit a sovereign state from imposing an anticompet-itive restraint as an act of government.”
Martin,
