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Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
Queensland Health
US Army
Argus Health

Generated: December 10, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,871,865

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Summary for Patent: 4,871,865

Title: Tricyclic aromatic compounds
Abstract:The present invention relates to compounds of formula I ##STR1## or a salt, ester or amide thereof; wherein R.sup.1 is --CH.sub.2 --CH.sub.2 --, CH.sub.2 --O-- or --O--CH.sub.2 --; R.sup.2 and R.sup.3 are the same or different and are each hydrogen, C.sub.1-4 alkyl or taken together with the nitrogen comprise a nitrogen-containing heterocyclic ring having four to six ring members; R.sup.4 is a single bond or a C.sub.1-7 bivalent aliphatic hydrocarbon group and may be joined to the aromatic ring system at the 2,3,8 or 9 positions; n is 0 to 3, and their use as anithistamine and antiasthma agents.
Inventor(s): Lever, Jr.; O. William (Skillman, NJ), Leighton; Harry J. (Chapel Hill, NC)
Assignee: Burroughs Wellcome Co. (Research Triangle Park, NC)
Application Number:06/894,306
Patent Claim Types:
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Foreign Priority and PCT Information for Patent: 4,871,865

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom8520662Aug 17, 1985

International Patent Family for Patent: 4,871,865

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria125535► Subscribe
Austria51867► Subscribe
Austria97401► Subscribe
Germany3650357► Subscribe
Germany3670290► Subscribe
Germany3689311► Subscribe
European Patent Office0214779► Subscribe
European Patent Office0316022► Subscribe
European Patent Office0351887► Subscribe
Spain2001519► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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Serving leading biopharmaceutical companies globally:

Express Scripts
Harvard Business School
Fish and Richardson
Chinese Patent Office
Federal Trade Commission
Boehringer Ingelheim

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