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:
Dec. 01, 2020
Filed:
Nov. 02, 2016
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Takeshi Nakayama, Tokyo, JP;
Shinji Sato, Tokyo, JP;
Masato Yamaguchi, Tokyo, JP;
Satoshi Takaichi, Tokyo, JP;
NIPPON PAPER INDUSTRIES CO., LTD., Tokyo, JP;
Abstract
A cellulose nanofiber with little contaminants and a high transparency is provided. A filtration method of a cellulose nanofiber dispersion including a step of filtering a cellulose nanofiber dispersion under elevated or reduced pressure by at least one of the filtration processes: (A) a filtration process using a filter aid; (B) a filtration process using a filter media selected from the group consisting of a metal porous filter media, an inorganic material porous filter media, and a polymer porous filter media; and (C) a filtration process using both the filter aid and the filter media.