Details for Patent: 4,923,892

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Summary for Patent: 4,923,892

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 antihistamine 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:	07/356,884
Patent Claim Types: see list of patent claims	Use; Composition; Formulation; Compound; Dosage form;

Drugs Protected by US Patent 4,923,892

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

Foreign Priority and PCT Information for Patent: 4,923,892

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
United Kingdom	8520662	Aug 17, 1985

International Family Members for US Patent 4,923,892

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Austria	97401	⤷ Sign Up
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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