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:
Feb. 18, 2025
Filed:
Jan. 07, 2022
Daikin Industries, Ltd., Osaka, JP;
Osaka University, Suita, JP;
Chisato Higashi, Osaka, JP;
Eiji Masuda, Osaka, JP;
Masayuki Tsuji, Osaka, JP;
Akira Shimodo, Osaka, JP;
Yasuhiro Nakano, Osaka, JP;
Akihiro Oshima, Suita, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
OSAKA UNIVERSITY, Osaka, JP;
Abstract
A method for producing low-molecular-weight polytetrafluoroethylene which includes: (1) irradiating high-molecular-weight polytetrafluoroethylene with radiation to a dose of 250 kGy or higher substantially in the absence of oxygen to provide low-molecular-weight polytetrafluoroethylene having a melt viscosity at 380° C. of 1.0×10to 7.0×10Pa·s. Also disclosed is a powder containing the low-molecular-weight polytetrafluoroethylene, the powder being substantially free from any of perfluorooctanoic acid and salts thereof.