Okla. Stat. tit. 15, § 15-73: How proposal revoked

A proposal is revoked:

1. By the communication of notice of revocation by the proposer

to the other party, before his acceptance has been communicated to

the former.

2. By the lapse of the time prescribed in such proposal for its

acceptance, or if no time is so prescribed the lapse of a reasonable

time without communication of the acceptance.

3. By the failure of the acceptor to fulfill a condition

precedent to acceptance; or,

4. By the death or insanity of the proposer.