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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5461051 B1

PDFFull Text
Date of Patent:
Oct. 24, 1995

Filed:

Jun. 28, 1994

Tetracyclic compounds having anti-allergic and anti-asthmatic activities

Applicant:
Inventors:

Hiroshi Fukumi, Tokyo, JP;

Toshiaki Sakamoto, Tokyo, JP;

Mitsuo Sugiyama, Tokyo, JP;

Yoshio Iizuka, Tokyo, JP;

Takeshi Yamaguchi, Tokyo, JP;

Assignee:

Sankyo Company, Limited, Tokyo, JP;

Attorney:

Frishauf, Holtz, Goodman & Woodward

Primary Examiner:

Philip I Patton

Int. Cl.
CPC ...
C07D / ; A61K / ;
U.S. Cl.
CPC ...
514214 ; 540578 ;
Abstract

Compounds of formula (I): ##STR1## in which: Q is nitrogen or .dbd.CH--; R.sup.1 and R.sup.2 are hydrogen, alkyl, alkoxy, hydroxy, trifluoromethyl or halogen; and R.sup.3 is a substituted alkyl groups, or a pharmaceutically acceptable salt thereof have valuable anti-allergic and anti-asthmatic activities. The compounds are prepared by reacting a corresponding compound where R.sup.3 is replaced by a hydrogen atom with a compound to introduce the group R.sup.3.

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Fukumi, Hiroshi. (1995). Tetracyclic compounds having anti-allergic and anti-asthmatic activities (U.S. Patent No. 5461051). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5461051

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