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. 24, 2026
Filed:
Feb. 22, 2021
Junkosha Inc., Kasama, JP;
Ryo Akutsu, Kasama, JP;
JUNKOSHA, INC., Kasama, JP;
Abstract
The present disclosure provides a multilayer tube which is flexible and exhibits excellent durability in terms of airtightness, while including as a main component, a polytetrafluoroethylene. The present disclosure is achieved by a multilayer tube which includes as a main component, a polytetrafluoroethylene, wherein if the total porosity (%) of the tube is plotted on the horizontal axis of a coordinate graph and the Martens hardness HMof the tube as described below is plotted on the vertical axis, coordinate points representing characteristics of the multilayer tube are within a quadrangle that is bounded by four coordinate points, namely a (), b (), c () and d () on the graph. Meanwhile, HMrepresents the Martens hardness at the time when the test force reaches 3 mN during the process of load application, with the maximum test force being set to 4 mN, if the inner surface of the tube is measured in accordance with ISO 14577.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile