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US Patent 4672116 - Substituted 5,6-dialkoxyquinazoline derivatives
US Patent Issued on June 9, 1987
Estimated Patent Expiration Date:
December 20, 2005Estimated 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.
Estimated Patent Expiration Date:
December 20, 2005Estimated 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.AbstractQuinazoline derivatives having an oxy substituent in 5 and 6 positions are described. The novel quinazoline derivatives are useful as cardiotonic agents. | Inventors
AssigneeApplicationNo. 06/811233 filed on 12/20/1985US Classes:544/286, Chalcogen bonded directly at 2-position544/116, The diazine ring is one of the cyclos in a bicyclo ring system544/119, Acyclic nitrogen containing544/250, Three or more ring hetero atoms in the tricyclo ring system544/285, Chalcogen bonded directly at 2- and 4-positions544/287, Chalcogen bonded directly at 4-position544/291, Nitrogen bonded directly at 2- and 4-positions544/292, Nitrogen bonded directly at 2-position544/293Nitrogen bonded directly at 4-positionField of Search544/286, Chalcogen bonded directly at 2-position544/285, Chalcogen bonded directly at 2- and 4-positions544/287, Chalcogen bonded directly at 4-position544/291, Nitrogen bonded directly at 2- and 4-positions544/250, Three or more ring hetero atoms in the tricyclo ring system544/116, The diazine ring is one of the cyclos in a bicyclo ring system544/119, Acyclic nitrogen containing544/292, Nitrogen bonded directly at 2-position544/293Nitrogen bonded directly at 4-positionExaminersPrimary: Hollrah, Glennon H.Assistant: Turnipseed, James H. Attorney, Agent or FirmUS Patent References43518322-(Piperazinyl)-4-pyrimidinaminesIssued on: 09/28/1982 Inventor: Rakhit , et al. International ClassesC07D 239/00 (20060101)C07D 239/95 (20060101) |
