Patent 4568685 Issued on February 4, 1986. Estimated Expiration Date: February 29, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
514/383, 1,2,4-triazoles (including hydrogenated)546/94, Ring nitrogen is shared by two of the cyclos548/266.4, The additional unsaturated hetero ring is one of the cyclos of a polycyclo ring system (except alkylenedioxyphenyl)548/267.6, Having -C(=X)-, wherein X is chalcogen, bonded directly to the nitrogen548/473Plural chalcogens bonded directly to ring carbons of the five-membered hetero ring (e.g., phthalimides, etc.)