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.

Date of Patent:
Feb. 19, 1991

Filed:

Feb. 22, 1990
Applicant:
Inventors:

Katsutoshi Miura, Saitama, JP;

Hiroyasu Koyama, Saitama, JP;

Toshiji Sugai, Saitama, JP;

Hiroaki Yamada, Saitama, JP;

Einosuke Sakurai, Saitama, JP;

Masato Horigome, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; A61K / ;
U.S. Cl.
CPC ...
514218 ; 514252 ; 540575 ; 544364 ; 544365 ;
Abstract

Compounds are disclosed of the formula ##STR1## wherein R.sub.1 is hydrogen; C.sub.1 -C.sub.6 alkyl; C.sub.3 -C.sub.6 cycloalkyl or diphenylmethyl;


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