1-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)piperazine hydrochloride dihydrate
Patent 4251532 Issued on February 17, 1981. Estimated Expiration Date: 
September 24, 1999. 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.
September 24, 1999. 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 ReferencesAntihypertensive agents Novel crystalline forms of prazosin hydrochloride Patent #: 4092315 InventorAssigneeApplicationNo. 06/078317 filed on 09/24/1979US Classes:514/252.17, The polycyclo ring system is quinazoline (including hydrogenated)544/291Nitrogen bonded directly at 2- and 4-positionsExaminersPrimary: Coughlan, Paul M. Jr.Attorney, Agent or FirmInternational ClassA61K 31/505 (20060101)AbstractAn improved anti-hypertensive agent, the hydrochloride salt of 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)piperazine dihydrate. |
| ||||||||||||||
