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. 06, 2012
Filed:
Jul. 31, 2008
Miki Yoshimune, Tsukuba, JP;
Kenji Haraya, Tsukuba, JP;
Miki Yoshimune, Tsukuba, JP;
Kenji Haraya, Tsukuba, JP;
Abstract
A hollow fiber carbon membrane is provided, which has excellent gas separation performance, unbreakable flexibility and high utility. The hollow fiber carbon membrane comprises carbonized substance obtained by calcination of a hollow fiber-like material formed from a polyphenylene oxide derivative, and has an external diameter in the range of 0.08 mm to 0.25 mm. The polyphenylene oxide derivative substantially comprises repeating units represented by the following (a) and (b) (in the structural formula, Rand Rindependently represent hydrogen atom or sulfone group, except that Rand Rare both hydrogen atoms), wherein the ratio A (%) of the repeating unit (b) to the repeating units (a)+(b) satisfies 15%<A<60%.