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:
Aug. 21, 1990
Filed:
Nov. 09, 1988
Applicant:
Inventors:
Masataka Ikeda, Nobeoka, JP;
Tsukasa Shima, Nobeoka, JP;
Assignee:
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428224 ; 428419 ;
Abstract
A nonwoven fabric having a weight per unit area of 5 g/m.sup.2 to 500 g/m.sup.2 composed of a polyallyene sulfide fiber having a mean fiber diameter of 0.1 .mu.m to 8.0 .mu.m is provided. The nonwoven fabric of extra fine polyallylene sulfide fibers has superior heat resistance, wet heat resistance, resistance to chemicals and fire retardant properties, suitable for various filter applications.