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. 08, 1991
Filed:
Sep. 19, 1989
Applicant:
Inventors:
Mutsuaki Murakami, Tokyo, JP;
Susumu Yoshimura, Yokohama, JP;
Naomi Nishiki, Kyoto, JP;
Katsuyuki Nakamura, Osaka, JP;
Kazuhiro Watanabe, Kawasaki, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; C01B / ; C01B / ;
U.S. Cl.
CPC ...
156224 ; 156228 ; 156245 ; 156285 ; 1563099 ; 264 296 ; 264 297 ; 264232 ; 264248 ; 264250 ; 264294 ; 264295 ; 264322 ; 26433112 ; 26433119 ; 264344 ; 264571 ; 423448 ; 423449 ;
Abstract
Graphite blocks are produced by a process wherein one or plural polymer films having a thickness of from 1 to 400 .mu.m and selected from aromatic polyimides, aromatic polyamides and polyoxadiazoles are heat treated to obtain carbonaceous films. A plurality of the carbonaceous films are hot pressure under certain conditions to obtain thick graphite blocks. The blocks have a remarkably improved rocking characteristic and are useful as radiation optical elements such as X-ray or neutron ray monochromators or filters. The blocks may be curved to obtain bent-type graphite articles.