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:
Feb. 16, 1993
Filed:
Sep. 27, 1991
Applicant:
Inventors:
Nobuo Someya, Tokyo, JP;
Tadao Kitazato, Tokyo, JP;
Takao Fujikawa, Kobe, JP;
Yasuo Manabe, Osaka, JP;
Assignees:
Marine Bio Co. Ltd., Tokyo, JP;
Kabushiki Kaisha Kobeseikosho, Kobe, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C01F / ;
U.S. Cl.
CPC ...
501-1 ; 106 35 ; 264 60 ; 264 65 ; 623 16 ; 423430 ;
Abstract
The invention relates to a process for producing a sintered body of calcium carbonate without permitting thermal decomposition of calcium carbonate during sintering, and to the sintered body. A powder material primarily comprising calcium carbonate is subjected to a cold powder pressing process to prepare a green compact, which is then heated in a high-pressure gas atmosphere consisting essentially of an inert gas at a temperature t.degree. C. of