Details for Patent: 4,923,892

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 R1 is --CH2 --CH2 --, CH2 --O-- or --O--CH2 --; R2 and R3 are the same or different and are each hydrogen, C1-4 alkyl or taken together with the nitrogen comprise a nitrogen-containing heterocyclic ring having four to six ring members; R4 is a single bond or a C1-7 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):	O. William Lever, Jr., Harry J. Leighton
Assignee:	SmithKline Beecham Corp
Application Number:	US07/356,884
Patent Claim Types: see list of patent claims	Use; Composition; Formulation; Dosage form;

Drugs Protected by US Patent 4,923,892

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

Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	125535
Austria	51867
Austria	97401
Germany	3650357
Germany	3670290