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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 5024912 B1

PDFFull Text
Date of Patent:
Jun. 18, 1991

Filed:

May. 10, 1989

5h-dibenzo(a,d) cycloheptanylidene derivative and 5h-dibenzo (a,d)

Applicant:
Inventors:

Toshie Neishi, Kawasaki, JP;

Toshihiro Kikuchi, Yokohama, JP;

Takao Takiguchi, Tokyo, JP;

Koichi Suzuki, Kawasaki, JP;

Masakazu Matsumoto, Yokohama, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Fitzpatrick, Cella, Harper & Scinto

Primary Examiner:

Girard L Raymond

Int. Cl.
CPC ...
G03G / ; G03G / ; C07C / ;
U.S. Cl.
CPC ...
430 59 ; 430 58 ; 430 72 ; 430 73 ; 430 74 ; 430 75 ; 430 76 ; 430 78 ; 546143 ; 546159 ; 546285 ; 549 68 ; 549480 ; 564318 ; 564391 ;
Abstract

A 5H-dibenzo [a,d] cycloheptenylidene derivative and a 5H-dibenzo [1,d] cycloheptenylidene derivative represented by the following general formula [I]: ##STR1## wherein X is --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--; R.sub.1 and R.sub.2 are alkyl groups, aralkyl groups, aromatic groups or heterocyclic groups, R.sub.3 and R.sub.4 are hydrogen atoms, alkyl groups, alkoxy groups or halogen atoms; and Ar.sub.1 is an aromatic group or a heterocyclic group, process for producing those derivatives, and electrophotographic photosensitive member using the same.

Find Patent Forward Citations

Neishi, Toshie. (1991). 5h-dibenzo(a,d) cycloheptanylidene derivative and 5h-dibenzo (a,d) (U.S. Patent No. 5024912). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5024912

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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