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:
Mar. 21, 2000
Filed:
Jun. 16, 1998
Applicant:
Inventors:
Tooru Kitagawa, Ohtsu, JP;
Michio Ishitobi, Ohtsu, JP;
Assignee:
Toyo Boseki Kabushiki Kaisha, Osaka-fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02G / ;
U.S. Cl.
CPC ...
428364 ; 428394 ;
Abstract
A polybenzazole fiber obtained through heat treatment, which has a high tensile modulus of not less than 300 GPa and a tensile strength of not less than 5.0 GPa, said fiber being characterized by an X-ray analysis by a fine structure thereof of at least one of the following (1) and (2):