LotjgheaN, J.

as the owner of certain applications for letters patent upon liquid fuel burning apparatus, entered into a license contract with Eiectrol, Incorporated, as licensee, to take effect as of January 1, 1940. The presently material parts thereof are the following:

“ First: Eiectrol agrees to pay Mason the sum of Two thousand four hundred dollars ($2400) per year during the life of this License Agreement ⅜ ⅜ *. Eiectrol further agrees to pay to Mason * * * royalties at the rates set forth in the table herein * * * on the tenth day of each month following the month during which the royalties are earned by way of shipments of burners. * * *

‘ ‘ The parties hereto are mindful of the fact that this License Agreement is being entered into before patents have actually been granted on the applications concerned and * * * that a division of its rights among competitors on a sub-licensee basis might facilitate the building and maintenance of stronger patent protection and promote more sales than could otherwise be effected. Eiectrol, therefore, agrees to undertake the creation of a so-called ‘ Mason Patent Estate ’ # * * and Eiectrol is expressly authorized and empowered to transfer to said Estate the right to grant (in its sole discretion) nonexclusive licenses to others, upon such terms and conditions as said Estate shall determine to be advisable and proper. Mason shall be entitled to receive through said Estate royalties from all sub-licensees at the same rates ⅜ ⅝ #

*486 “Second: Mason hereby grants to Electrol, its successors and assigns, the sole and exclusive right, license and privilege to make, use and sell * * # feel burners embodying the inventions * * ⅜ for the fell term of the latest of said Letters Patent issued or to issue on said applications * * *, unless this License Agreement be terminated earlier, as hereinafter provided * * *.

“ Sixth: In the event Electrol or the ‘ Mason Patent Estate ’ shall to pay any sum or sums provided as royalties under the provisions hereof * * *, Mason may terminate the license granted by this License Agreement to Electrol and by the ‘ Mason Patent Estate ’ to its sub-licensees by giving Elec-trol thirty (30) days’ notice in writing of such termination; but * # * should Electrol and/or the ‘ Mason Patent Estate ’ within said thirty (30) days make full and complete payment of all sums due, such termination shall not take effect ⅝ * *.

“ Seventh: All rights, privileges and benefits of the respective parties under this License Agreement and the license hereby granted to Electrol and all sub-licenses granted by the ‘ Mason Patent Estate ’ shall be terminated and canceled for all purposes without notice in the event Electrol or the ‘ Mason Patent Estate ’ shall fail to pay to Mason within sixty (60) days after the expiration of any quarterly period of any year after the calendar year 1940 (quarterly periods beginning on the first day of January, April, July and October of each year), the amount of all royalties to which Mason is entitled for such quarterly period in accordance with the provisions of this License Agreement. ’ ’

No royalties were paid to Mason after March, 1941, with the result that he brought this action on April 20, 1942, for breach of the contract. As a defense Electrol set up its own nonpayment of royalties in the period from April 1, 1941, to June 1, 1941, on the theory that this sixty-day omission had put an end to the contract on both sides by operation of the above words of paragraph Seventh. A motion by Electrol for judgment on the pleadings followed and was denied on Mason’s argument that the contract imposed upon Electrol an ‘ ‘ obligation to pay royalties for the life of .the patent structure.” Bv leave of the Appellate Division, Electrol has now *487 brought the case here upon the following question certified: “ Should defendant’s motion for judgment on the pleadings have been granted? ”

The first thing to be noticed is that the contract is silent in respect of any specific date for its termination.

Special Term was of opinion that Electrol at all events was estopped from asserting its own default as a ground for extin-guishment of its obligation. The difficulty we have with this solution is that thereby, as it seems to us, an absolute quality in undertaking is presumed from the start.

It is in order next to notice what Mason’s counsel now have in mind when they speak of ‘ ‘ the patent structure. ’ ’ They say: “ Paragraph ‘ Seventh ’ clearly contemplates cancellation of such ‘ rights, privileges and granted to said ‘ respective parties ’ to the patent structure, i. e., Electrol, Mason Patent Estate and its sub-licenses — and nothing else.” (The emphasis is first-hand.) But as appears by paragraph First, Mason Patent Estate had not even been organized when the contract went into effect. Mason’s argument thus imports that the phrase ‘ respective parties ’ — as it occurs in paragraph Seventh— designates not the parties to the contract, but only Electrol and one or more persons who were nonexistent at the time the contract was signed by Electrol and by Mason. This interpretation was accepted by a majority of the Appellate Division. They said: “ The license agreement was to continue as long as the patent structure underlying it. Paragraph ‘ Seventh ’ was intended to work a forfeiture of defendant’s rights to exploit plaintiff’s patents; not to forfeit plaintiff’s right to damages for its breach.” (267 App. Div. 216, 217.)

We cannot go along with so valiant a construction. There is nothing obscure or absurd in a stipulation that all rights of the respective parties under an agreement shall be terminated for all purposes, after one of the parties to the contract shall have failed in performance for a stated period. Consequently the express provision to that effect in paragraph Seventh ought not to be artificially altered by us, unless its natural meaning is unworthy of the whole of the language the parties have used. Looking through this contract from that standpoint, we do not see how the words of paragraph Seventh can normally bear the implied meaning that Mason imputes to them; and, on the *488 other hand, we believe the regular significance of that paragraph disproves the liability charged to Electrol by this canse of action.

The orders should be reversed and the motion granted, with costs to the appellant in all courts. The question certified should be answered in the affirmative.

LehmaN, Ch. J., Lewis, CoNway, and Thachee, JJ., concur; Rippey, J., taking no part.

Orders reversed, etc.