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:
Nov. 25, 2025
Filed:
Feb. 16, 2022
Applicant:
Daikin Industries, Ltd., Osaka, JP;
Inventors:
Hitoshi Imamura, Osaka, JP;
Hiroyuki Hamada, Osaka, JP;
Eri Mukai, Osaka, JP;
Yuuki Kuwajima, Osaka, JP;
Manabu Fujisawa, Osaka, JP;
Assignee:
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 11/06 (2006.01); B29C 48/00 (2019.01); B29C 48/09 (2019.01); B29C 48/27 (2019.01); B29C 48/32 (2019.01); B29D 23/00 (2006.01); C08F 214/26 (2006.01); B29C 48/69 (2019.01); B29C 48/86 (2019.01); B29C 48/92 (2019.01); B29K 27/18 (2006.01); B29K 105/00 (2006.01); B29L 23/00 (2006.01); C08J 5/00 (2006.01); C08L 27/18 (2006.01);
U.S. Cl.
CPC ...
F16L 11/06 (2013.01); B29C 48/022 (2019.02); B29C 48/09 (2019.02); B29C 48/274 (2019.02); B29C 48/32 (2019.02); B29D 23/00 (2013.01); B29D 23/001 (2013.01); C08F 214/262 (2013.01); B29C 48/69 (2019.02); B29C 48/865 (2019.02); B29C 48/92 (2019.02); B29C 2948/92704 (2019.02); B29C 2948/92904 (2019.02); B29K 2027/18 (2013.01); B29K 2105/0085 (2013.01); B29K 2995/0072 (2013.01); B29L 2023/00 (2013.01); C08J 5/00 (2013.01); C08J 2327/18 (2013.01); C08L 27/18 (2013.01);
Abstract
Provided is a tube comprising a tetrafluoroethylene/fluoroalkyl vinyl ether copolymer, wherein the tube inner surface has a surface roughness Ra of 5 nm or less measured by atomic force microscopy (AFM) with an evaluation length set to 3 μm, and the tube has an amount of metals eluted from the tube inner surface of 0.30 ng/cmor less.