Substituted 5,6-dialkoxyquinazoline derivatives
Patent 4672116 Issued on June 9, 1987. Estimated Expiration Date: 
December 20, 2005. 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.
December 20, 2005. 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 References2-(Piperazinyl)-4-pyrimidinamines Patent #: 4351832 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-positionExaminersPrimary: Hollrah, Glennon H.Assistant: Turnipseed, James H. Attorney, Agent or FirmInternational ClassesC07D 239/00 (20060101)C07D 239/95 (20060101) AbstractQuinazoline derivatives having an oxy substituent in 5 and 6 positions are described. The novel quinazoline derivatives are useful as cardiotonic agents.Field of SearchChalcogen bonded directly at 2-positionChalcogen bonded directly at 2- and 4-positions Chalcogen bonded directly at 4-position Nitrogen bonded directly at 2- and 4-positions Three or more ring hetero atoms in the tricyclo ring system The diazine ring is one of the cyclos in a bicyclo ring system Acyclic nitrogen containing Nitrogen bonded directly at 2-position Nitrogen bonded directly at 4-position |
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