Ronald C. Keller (“Keller”) appeals a grant of summary judgment by the District Court 1 in favor of Bass Pro Shops, Inc. (“Bass Pro”), and the denial of his cross-motion for summary judgment. We affirm, although our affirmance is on grounds different from those relied upon by the District Court.
Keller filed this action in state court, seeking a declaratory judgment that the patent assignment he made to Bass Pro in August 1989 was void for lack of consideration. Bass Pro removed the action to federal court on the basis of diversity jurisdiction and federal question jurisdiction. 2 Keller contended that Bass Pro, for whom Keller’s company Sports Products manufactured lures almost exclusively, gave no valuable consideration in exchange for the assignment of a patent on the process for making the Tornado lure. 3 The court determined that even Keller’s version of the facts showed Keller received consideration for the assignment in the form of the expectation of continued lure purchases by Bass Pro from Keller’s company. Summary judgment therefore was entered in favor of Bass Pro. Because we affirm the judgment on other grounds, we need not consider whether the expectation of future business constituted consideration for the assignment.
Keller and his brother, through their company Kel-Lure, developed the process for making the Tornado lure with Richard Bleam, a Bass Pro employee, at Bass Pro’s request, and began selling the Tornado lures to Bass Pro in 1988. In late 1988 Kel-Lure sold all of its assets at auction. The assets were purchased by the Kellers, and the new corporation called Sports Products began where Kel-Lure left off. On August 8, 1989, just before Sports Products was moved to Costa Rica and reincorporated as Productos Deportivos, Keller, his brother, and Bleam assigned Bass Pro their patent rights to the Tornado lure. The assignment is evidenced by a written instrument, see Appendix at *124 143-45, that fully complies with the requirements of 35 U.S.C. § 261 (1988), which is the statute governing the validity of patent assignments. It appears to have been contemplated (although it is nowhere mentioned in the written instrument) that Keller’s company would continue to manufacture the Tornado lure for purchase by Bass Pro. To Keller’s surprise, however, he did not become a shareholder in the new entity Productos De-portivos, from which Bass Pro continued to purchase Tornado lures. In the summer of 1990, Keller severed his employment with Productos Deportivos. Keller claims he was forced out of the company by his brother and thus did not share in any profits from the company’s continuing sales to Bass Pro of the Tornado and other lures.
On appeal, Keller contends that the District Court erred in determining that Bass Pro gave valuable consideration for the assignment of his patent rights. Without reaching that issue, we affirm on the ground that Keller cannot challenge the validity of the completed assignment for lack of consideration because consideration is recited in the written instrument of assignment, and, alternatively, that the assignment was an irrevocable, voluntary transfer of the patent, not requiring consideration.
We review the District Court’s grant of summary judgment de novo. Fed.R.Civ.P. 56(e);
United States ex rel. Glass v. Medtronic, Inc.,
We conclude that Keller is es-topped from challenging the assignment on the basis of lack of consideration because consideration is recited in the written instrument of assignment.
4
Under Arkansas law, the recitation of consideration estops the grantor of a deed from claiming that it was executed without consideration.
Hayes v. Sanger,
In the alternative, we affirm the District Court on the ground that the patent assignment was a completed voluntary conveyance and that it therefore is not subject to attack for lack of consideration.
7
“An assignment of a chose in action is valid after delivery even though made without consideration.”
Nebco & Assocs. v. United States,
We already have noted that the assignment in the present case fully complies with the governing federal statute. Keller makes no contention to the contrary. To the extent that state law may bear on the effect of an assignment that is valid as a matter of federal law&emdash;a question we need not and do not decide&emdash;we observe that under Arkansas law the elements of an effective assignment are delivery of the subject matter with intent to make an immediate and complete transfer of all right, title, and interest from the assignor to the assignee.
See Turner v. Rust,
The judgment of the District Court is affirmed.
Notes
. The Honorable Beverly R. Stites, United States Magistrate Judge for the Western District of Arkansas, to whom the case was referred for final disposition by consent of the parties pursuant to 28 U.S.C. § 636(c) (1988 & Supp. IV 1992).
. Magistrate Judge Stites ruled that there was no federal question jurisdiction but that the parties were diverse. Since federal subject matter jurisdiction is established on the basis of diversity of citizenship, see 28 U.S.C. § 1332 (1988), we have no occasion to consider whether the Magistrate Judge was correct in finding a lack of federal question jurisdiction in this case involving the validity of the assignment of a patent.
.Keller originally claimed the assignment was procured under duress. Magistrate Judge Stites rejected this claim as a matter of law. Keller abandons the duress argument on appeal.
. The assignment recites that it is made for "good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged.” Appendix at 143.
. The recitation clause does not bar the use of parol evidence to show that the deed was procured by fraudulent means.
Hayes v. Sanger,
. In
Westinghouse Electric & Manufacturing Co. v. Formica Insulation Co.,
. In
McCuiston v. Rollman,
. The instrument provides that the assignors “by these presents do sell, assign and transfer unto said Bass Pro Shops, Inc. the full and exclusive right, title and interest, throughout the world,” to the patent on the Tornado lure. Appendix at 143.
. Even if Keller expected (and was entitled to) future performance, that future performance would not be a condition of the assignment so as to render it void in the event of nonperformance. Failure to perform would simply give rise to an action for breach.
