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. 22, 1991
Filed:
Sep. 05, 1989
Applicant:
Inventors:
Makihiko Mori, Kitakatsuragi, JP;
Katsumi Fujita, Osaka, JP;
Yoshiteru Nakagawa, Yamatokoriyama, JP;
Yasunori Goda, Takarazuka, JP;
Toyohiro Maeda, Tenri, allof, JP;
Assignee:
Osaka Gas Company Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10C / ; C10C / ;
U.S. Cl.
CPC ...
208 39 ; 208 22 ; 208 44 ; 208 42 ;
Abstract
Pitch substantially free from primary and secondary QI components and solids comprising secondary QI components are prepared by centrifuging coal tar or coal tar pitch at a high temperature, heat-treating the separated supernatant liquid and centrifuging again the liquid at a high temperature.
Mori, Makihiko. (1991). Process for treating coal tar or coal tar pitch (U.S. Patent No. 4986895). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4986895
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile