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. 29, 1992
Filed:
Jun. 12, 1992
Applicant:
Inventors:
Alessandro Stopponi, Rome, IT;
Claudio Demofonti, Rome, IT;
Claudio Valentini, Rome, IT;
Raffaello Sisto, Rome, IT;
Ugo Pedretti, Milan, IT;
Assignee:
Eniricerche S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; D01F / ; D01F / ;
U.S. Cl.
CPC ...
521180 ; 264 455 ; 264193 ; 264196 ; 264197 ; 264198 ; 264150 ; 521 51 ; 55 16 ;
Abstract
A hollow fiber of amorphous, hydroxy-ethylated poly-(2,6-dimethyl-p-oxyphenylene) (PPO-OH) with a glass transition temperature (Tg) of from 180.degree. to 200.degree. C. is disclosed, which is formed by a high-density, microporous layer on a macroporous backing, and having an outer diameter comprised within the range of from 450 to 550 .mu.m and an inner diameter comprised within the range of from 250 to 400 .mu.m. The process for preparing the hollow fibre and the use of said fibre in the processes of separation of gas mixtures are disclosed as well.