1,3-Dimethyl- 1H-pyrazolo(4,3-D) pyrimidine-7 (6H)-ones
Patent 3939161 Issued on February 17, 1976. Estimated Expiration Date: 
February 17, 1993. 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.
February 17, 1993. 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.Patent References 2554213 3165520 InventorsAssigneeApplicationNo. 410588 filed on 10/29/1973US Classes:544/262, The other cyclo in the bicyclo ring system is five-membered544/118, Four or more ring nitrogens in the bicyclo ring system548/371.7, Nitrogen attached indirectly to the diazole ring by acyclic nonionic bonding548/372.1Chalcogen attached directly to the nitrogen by nonionic bonding [e.g., N-(2-hydroxyethyl)-4-nitropyrazole, etc.]ExaminersPrimary: Daus, Donald G.Assistant: Turnipseed, James H. Attorney, Agent or FirmAbstractNovel 1,3-dimethyl-1H-pyrazolo[4,3-d]pyrimidine-7(6H)-ones. The compounds exhibit central nervous system activity, particularly anti-convulsant and sedative activity, and also exhibit anti-inflammatory activity and gastric antisecretory activity. |
| ||||||||||||||
