Amana Refrigeration, Inc. (“Amana”) appeals the order of the United States District Court for the Northern District of Iowa in Amana Refrigeration, Inc. v. Quadlux, Inc., No. 96-CV-350 (N.D.Iowa Dec. 24, 1997), which granted Quadlux, Inc.’s (“Quadlux”) motion to dismiss Ama-na’s action seeking declaratory and injunc-tive relief pertaining to the validity and infringement of Quadlux’s U.S. Patent No. 5,517,005 (the “ ’005 patent”), and damages for defamation and trade libel. We affirm.
Background
Quadlux, a California corporation with its principal place of business in California, owns the ’005 patent, which claims a “Visible Light and Infra-Red Cooking Apparatus” that cooks food as quickly as a microwave oven, but with results similar to those achieved in a conventional oven. Quadlux manufactures and sells a commercial embodiment of its invention, the “FlashBake” oven. Amana, a Delaware corporation with its principal place of business in Iowa, commenced negotiations with Quadlux to license the FlashBake technology in August 1993, and the two companies entered into a confidentiality agreement. Quadlux representatives made two visits to Amana headquarters in Iowa over the course of the negotiations, but negotiations ended unsuccessfully in February 1994, after Quadlux decided to license the technology to another appliance manufacturer.
Amana then developed and started to market its WAVE ovens. Like Quadlux’s FlashBake ovens, the WAVE ovens use a combination of visible and infrared radiation to cook food. On November 21, 1996, *855 counsel for Quadlux sent a warning letter to Amana in Iowa, enclosing a copy of the ’005 patent, which had issued May 14, 1996, and stating that Quadlux intended to enforce both the patent and the confidentiality agreement. Additionally, Quadlux sent letters terminating its contractual relationship with three distributors in Maryland, Ohio, and Illinois because those distributors dealt with Amana, whom Quadlux asserted was “going to proceed with the introduction of a copy of the FlashBake oven.”
Amana sued Quadlux in the United States District Court for the Northern District of Iowa, seeking, inter alia, declaratory judgments of patent invalidity and noninfringement, and damages for defamation and trade libel, both Iowa state law claims. In response, Quadlux filed a July 31, 1997, declaration by its president and chief executive officer, Phillip Samper, covenanting not to “assert any claim of patent infringement against Amana under [the ’005 patent] as it presently reads, with respect to any product currently advertised, manufactured, marketed or sold by Amana, or any product which was advertised, manufactured, marketed or sold by Amana prior to the date of this declaration.”
The trial court dismissed Amana’s declaratory judgment actions as moot in light of the Quadlux covenant, and dismissed Amana’s defamation and trade libel claims for lack of personal jurisdiction over Quad-lux. Amana appeals.
Discussion
Actual Controversy
Under the Declaratory Judgment Act, 28 U.S.C. § 2201(a) (1994), a district court has jurisdiction over a declaratory judgment action only when there is an “actual controversy.” “Whether an actual controversy exists upon particular facts is a question of law, and is subject to plenary appellate review.” BP Chems. Ltd. v. Union Carbide Corp., 4 F.3d 975, 978, 28 USPQ2d 1124, 1127 (Fed.Cir.1993). For an actual controversy to exist, “[t]here must be both (1) an explicit threat or other action by the patentee, which creates a reasonable apprehension on the part of the declaratory plaintiff that it will face an infringement suit, and (2) present activity which could constitute infringement or concrete steps taken with the intent to conduct such activity.” Id. at 978, 28 USPQ2d at 1126.
Although an actual controversy may have existed before Quadlux filed its covenant not to assert a patent infringement claim against Amana, it is not necessary for us to address that issue. “[A]n actual controversy must be extant at all stages of review, not merely at the time the complaint is filed,”
Preiser v. Newkirk,
Amana argues that the Quadlux covenant did not remove Amana’s reasonable apprehension of being sued with regard to its new products “in the pipeline,” but not advertised, manufactured, marketed, or sold before the filing date. However, an actual controversy cannot be based on a fear of litigation over future products. See id. (“The residual possibility of a future infringement suit based on [the alleged *856 infringer’s] future acts is simply too speculative a basis for jurisdiction over [the alleged infringer’s] counterclaim for declaratory judgments of invalidity.”). The Quadlux covenant ensures that Quadlux is forever estopped from asserting liability against Amana in connection with any products that Amana advertised, manufactured, marketed, or sold before July 31, 1997, and that resolves the controversy.
Amana also argues that Quadlux’s promise not to assert a claim based on the patent “as it presently reads” subjects Amana to risk of further litigation on the ’005 patent subject matter because of the potential grant of a reissue patent. We rejected this argument in
Spectronics Corp. v. H.B. Fuller Co.,
Personal Jurisdiction
We turn now to Amana’s assertion that the district court had personal jurisdiction over Quadlux for the purposes of Amana’s trade libel and defamation claims. Amana contends that the court erred in analyzing the personal jurisdiction issue under Eighth Circuit law rather than Federal Circuit law.
Although under our courtesy rule we are generally guided by the law of the regional “circuit to which district court appeals normally lie, unless the issue pertains to or is unique to patent law,”
Molins PLC v. Quigg,
More recently, in
3D Systems, Inc. v. Aarotech Lab., Inc.,
Unlike
Beverly Hills, Akro, Viam,
and
Aarotech,
this case presents a situation in which determination of the personal jurisdiction issue is no longer “intimately involved in the substance of enforcement of the patent right.”
Viam,
Amana argues that our approach amounts to abandonment of our mandate to achieve national uniformity in the field of patent law, and will result in multiple jurisdictional analyses in the same case, with different conclusions on the personal jurisdiction issue as to patent and non-patent claims. This argument does not take into account the absence of an actual patent controversy in this case. Our mandate to achieve uniformity in patent law does not demand that we apply our personal jurisdiction rules to state law claims where no legitimate patent issue exists.
To exercise personal jurisdiction over an out-of-state party, a court must determine whether personal jurisdiction is (1) permitted by the forum state’s long-arm statute, and (2) consistent with due process. See
Burger King v. Rudzewicz,
The trial court properly held that exercising personal jurisdiction over Quad-lux in Iowa would be inconsistent with due process. In this analysis, Eighth Circuit law requires courts to evaluate the out-of-state party’s contacts, considering “(1) the nature and quality of the contacts with the forum state; (2) the quantity of those contacts; (3) the relation of the cause of action to the contacts; (4) the interest of the forum state in providing a forum for its residents; and (5) the convenience of the parties.”
Bell Paper Box, Inc. v. U.S. Kids, Inc.,
Quadlux’s Iowa contacts do not relate to Amana’s trade libel and defamation claims. Significantly, these claims arise not from any of Quadlux’s Iowa contacts, but from the three letters sent by Quadlux to distributors in Maryland, Ohio, and Illinois. Moreover, Quadlux’s Iowa contacts are very limited. As the trial court found,
Quadlux has no interest in any property in Iowa, and has visited the state on only two occasions in the course of discussing a potential business arrangement with Amana, upon which the parties never reached agreement. Quadlux has solicited sales through national publications, and sent a letter of inquiry or warning to Amana regarding the ’005 patent and their confidentiality agreement. Additionally, it appears that Quadlux has made only very limited sales of ovens in Iowa.
*858 Amana, No. 96-CV-350. We agree that the.nature and quality of these contacts are too limited to permit an Iowa court to exercise personal jurisdiction over Quad-lux.
Conclusion
Accordingly, the order of the United States District Court for the Northern District of Iowa is affirmed.
AFFIRMED.
Notes
In letters terminating its contracts with the Maryland, Ohio, and Illinois distributors, Quadlux alleges that Amana was "going to proceed with the introduction of a copy of the FlashBake oven.” "Copying" is the key issue, not patent infringement.
