Hexahydro-dibenzo[b,d]pyran-9-ones as antiasthmatic drugs
Patent 4087546 Issued on May 2, 1978. Estimated Expiration Date: 
May 2, 1995. 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.
May 2, 1995. 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 3928598 Hexahydro-dibenzo[b,d,]pyran-9-ones as psychotropic, particularly anti-depressant drugs Dihydroxyhexahydrodibenzo[b,d]pyrans Hexahydro-dibenzo[b,d]pyran-9-ones as sedative drugs Patent #: 3987188 InventorsAssigneeApplicationNo. 658438 filed on 02/17/1976US Classes:514/455Chalcogen bonded directly to ring carbon of the hetero ringExaminersPrimary: Ore, Dale R.Attorney, Agent or FirmInternational ClassesA01N 009/28A61K 031/35 AbstractUse of 1-hydroxy-3-alkyl-6,6a,7,8,10,10a-hexahydro-9H-dibenzo[b,d]pyran-9-ones as antiasthmatic drugs. | |
