Novel tetrahydrocannabinol type compounds
Patent 4179517 Issued on December 18, 1979. Estimated Expiration Date: 
December 28, 1996. 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 28, 1996. 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 ReferencesProcess for the preparation of (-)-6a,10a-trans-6a,7,8,10a-tetrahydrodibenzo[b,d]-pyrans Patent #: 4025516 InventorsAssigneeApplicationNo. 05/755083 filed on 12/28/1976US Classes:514/454, Tricyclo ring system having the hetero ring as one of the cyclos549/390Dibenzo(b,d)pyrans (including hydrogenated)ExaminersPrimary: Chan, NickyAttorney, Agent or FirmInternational ClassesC07D 311/00 (20060101)C07D 311/80 (20060101) Foreign Application Priority Data1976-01-12 ILAbstractA pharmaceutical composition of matter substantially devoid of "cannabis-e" CNS activity containing as active ingredient a compound of the formula ##STR1## wherein A-----B designates a 1(2) or a 6(1) double bond and wherein R' designates --H or --CO--R where R is lower alkyl, and R" designates alkyl and novel compounds of the 3S,4S configuration of the formula ##STR2## wherein A----B designates a 1(2) or a 6(1) double bond, R' designates hydrogen or --CO--R where --R is lower alkyl, and R" designates alkyl of at least 6 carbon atoms.Other References
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