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:
Oct. 21, 2014
Filed:
Aug. 09, 2012
Iori Tomoda, Kanagawa, JP;
Yosuke Uchida, Chiba, JP;
Hiroyuki Nagatani, Tokyo, JP;
Ayano Kawae, Tokyo, JP;
Takahiro Cho, Saitama, JP;
Wakana Uesugi, Tokyo, JP;
Tetsuo Koshitsuka, Saitama, JP;
Iori Tomoda, Kanagawa, JP;
Yosuke Uchida, Chiba, JP;
Hiroyuki Nagatani, Tokyo, JP;
Ayano Kawae, Tokyo, JP;
Takahiro Cho, Saitama, JP;
Wakana Uesugi, Tokyo, JP;
Tetsuo Koshitsuka, Saitama, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
A method for producing bleached pulp, including processing unbleached pulp obtained by cooking a lignocellulose substance, followed by treatment with peroxomonosulfuric acid and thereafter by multistage chlorine-free bleaching treatment starting from chlorine dioxide treatment; a method for producing bleached pulp, including processing unbleached pulp for alkali-oxygen bleaching followed by chlorine-free bleaching treatment or totally chlorine-free bleaching treatment to bleach it to a degree of brightness of from 70 to 89%, and further followed by treatment with peroxomonosulfuric acid; and paper produced by the use of the bleached pulp produced according to these production methods, at a papermaking pH of at most 6.