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. 05, 1983
Filed:
Sep. 29, 1981
Applicant:
Inventors:
Minoru Yotsuya, Toride, JP;
Kiyoshi Mae, Toyonaka, JP;
Seikyu Jinnouchi, Matsudo, JP;
Toshio Ochiai, Matsudo, JP;
Assignee:
Mitsubishi Gas Chemical Co., Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
D06L / ; D06L / ;
U.S. Cl.
CPC ...
8111 ; 8107 ;
Abstract
A fibrous material is bleached by hydrogen peroxide in a weakly acidic state at a pH of 5-7, and then in a weakly alkaline state at a pH of 8.5-1.1 by adding an alkaline agent to the hydrogen peroxide by one whole charge or continuously after the bleaching in the weakly acidic state and utilizing the remaining hydrogen peroxide. The bleached fibrous material has a soft handling and a high whiteness, and no bleaching unevenness.
Yotsuya, Minoru. (1983). Process for bleaching fibrous material by hydrogen peroxide (U.S. Patent No. 4378967). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4378967
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile