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:
Jan. 29, 1985
Filed:
Feb. 24, 1983
Applicant:
Inventors:
Tamio Yamamoto, Matsuyama, JP;
Tsukasa Kobayashi, Matsuyama, JP;
Tadashi Hirakawa, Kusatsu, JP;
Makoto Yoshida, Ibaraki, JP;
Masumi Okumura, Joyo, JP;
Assignee:
Teijin Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21F / ; D04H / ;
U.S. Cl.
CPC ...
428288 ; 1621573 ; 428296 ;
Abstract
A paper-like polyester sheet having an enhanced filtering property, an excellent mechanical strength and satisfactory touch and appearance, comprises polyester staple fibers and has a coefficient of air flow resistance of 1,000 to 50,000 dyn.s/cm.sup.4 at a volume fraction of the fibers of from 0.01 to 0.24.