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:
Sep. 22, 1981
Filed:
Jul. 02, 1979
Applicant:
Inventors:
John W Soehngen, Berkeley Heights, NJ (US);
John C Chen, Westfield, NJ (US);
Assignee:
Celanese Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; D01D / ;
U.S. Cl.
CPC ...
264 41 ; 2642095 ; 2642104 ; 2642108 ; 264235 ; 2642888 ; 428376 ;
Abstract
The present invention provides a process for preparing microporous hollow fibers by solvent stretching a non-porous hollow precursor fiber having a controlled degree of molecular orientation as measured by birefringence. Control of the precursor fiber orientation, yields a microporous hollow fiber having an improved balance of mechanical strength and permeability.
Soehngen, John. (1981). Process for preparing microporous hollow fibers (U.S. Patent No. 4290987). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4290987
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile