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.:
Date of Patent:
Apr. 01, 1980
Filed:
Jan. 13, 1978
Applicant:
Inventors:
Katsuichi Noguchi, Yokohama, JP;
Kazuo Maeda, Yokohama, JP;
Yuriko Anzai, Yokohama, JP;
Minoru Hirai, Shizuoka, JP;
Kazuo Izumi, Shizuoka, JP;
Kenji Niijima, Shizuoka, JP;
Assignees:
Toho Beslon Co., Ltd., Tokyo, JP;
The Japan Tobacco and Salt Public Corp., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A24B / ;
U.S. Cl.
CPC ...
1312 / ; 4234471 ;
Abstract
A tobacco smoke filter capable of selectively removing irritating materials and unpleasant bitter components from tobacco smoke and containing as a filter element nitrogen-containing activated carbon fibers produced by oxidizing acrylonitrile polymer fibers and then activating the oxidized fibers.