OPINION OF THE COURT
On defendant’s appeal, the issue presented is whether a written contract between the parties should be construed to include a promise by defendant to exercise reasonable diligence to exploit plaintiff’s patented process. We hold that the contract imposed that burden but because other issues of fact remain, we affirm Special Term’s denial of defendant’s motion for summary judgment.
By agreement dated January 30, 1973, plaintiff granted to defendant an exclusive license for the use and dissemination of the patented process. Defendant agreed to pay plaintiff a percentage of the cost of superalloy powders used in the process and further agreed that plaintiff would receive 25% of all lump sum payments and 40% of all royalties paid to defendant by sublicensees. The agreement also provided for payment by defendant of minimum royalties of $20,000 per year. The minimum payment was not guaranteed, however, because plaintiff’s sole right was to terminate the license on defendant’s failure to make up the deficiency if plaintiff’s share of the lump sum payments and royalties did not amount to $20,000 in any calendar year.
On November 18,1974 defendant entered into a written sublicensing agreement with United Aircraft Corporation (United), a manufacturer of jet aircraft engines, under which United agreed to pay $5,300,000 to defendant over an eight-year period.
We are here concerned only with the first cause of action in plaintiff’s complaint.
Initially, we note our agreement with defendant’s argument that there are no inferences to be drawn from extrinsic evidence. Examinations before trial have been completed and it is acknowledged by the parties that prewriting discussions did not include the specific subject of a promise by defendant to exploit plaintiff’s invention (cf. Gluck v Amsterdam Print. & Litho Corp.,
It is a primary rule of contract construction that where the terms of a written agreement are clear and unambiguous, the intent of the parties must be drawn from the contract language (Zion v Kurtz,
The principles thus stated are of particular consequence where the essence of the contract is the grant of a license under which the fate of the subject matter is placed exclusively with the licensee for the purpose of exploitation and profit. Implicit in such an arrangement is the licensee’s obligation to exploit the license (Wood v Duff-Gordon, 222
Turning to the comprehensive contract under review, the grant of the exclusive license is made in paragraph “3” in these words: “License. Licensor hereby grants to Licensee an exclusive license, with the right to grant sublicenses, to use the Licensed Process throughout the world, including an exclusive license,, with the right to grant sublicenses, throughout the world, under the licensed patents to make, to have made, to use and to sell the apparatus, articles and compositions and to practice and have practiced the processes covered thereby.”
Too numerous to recite are the other provisions relating to rights and obligations of the parties in contemplation of the expansive use of the patented process by defendant and by sublicensees. It is said, however, that the finding of a promise of exploitation is precluded by the provision for the payment by defendant of minimum royalties. While it is true that a guaranteed stipulated minimum payment is relevant in determining the intent of the parties on the question of whether the covenaiit should be implied (see Vacuum Concrete Corp. v American Mach. & Foundry Co.,
Reading the contract as a whole, the conclusion is inescapable that the clear purpose of the license was to achieve the widest possible use of the process “throughout the world”. It is but literal formalism, and no more, which supports the claim that the precise promise of exploitation is lacking. That promise is so interwoven in the whole writing as to make the agreement “‘instinct with an obligation’” to use due diligence to exploit the process (Wood v Duff-Gordon,
The order should be affirmed in accordance herewith.
Callahan, Doerr, Denman and Schnepp, JJ., concur.
Order unanimously affirmed, without costs.
Notes
. A tripartite agreement among plaintiff, defendant and United was executed contemporaneously with the sublicensing agreement but bears no direct relevance to the issue on appeal.
. Plaintiff has withdrawn his appeal from that part of Special Term’s order which granted summary judgment dismissing his second and third causes of action in which he contended that his share of United’s payments to defendant should have been computed at 40% rather than 25%.
. Even if we were to conclude that the writing is ambiguous on this issue, in the absence of any tender of extrinsic evidence to resolve the ambiguity, the question is one of'law to be determined by the court. (Olson Enterprises v Agway, Inc.,
