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:
May. 18, 1999
Filed:
Oct. 17, 1996
Applicant:
Inventors:
Takaaki Ami, Kanagawa, JP;
Katsuyuki Hironaka, Kanagawa, JP;
Koji Watanabe, Kanagawa, JP;
Akio Machida, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
117-3 ; 117-2 ; 117-4 ; 117-6 ; 117944 ; 505501 ;
Abstract
Provided is a process for preparing a bismuth compound at a heat treatment temperature lower than conventional. A bismuth compound is prepared by the steps of heating under vacuum to form a reduced phase and heating under oxidizing environment of normal or lower pressure.