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:
Dec. 16, 1980
Filed:
Oct. 27, 1978
Applicant:
Inventors:
Tomiya Isshiki, Tokyo, JP;
Tetsuo Tomita, Tokyo, JP;
Toshiaki Kozaki, Matsudo, JP;
Osamu Aoki, Matsudo, JP;
Mitsuo Abe, Tokyo, JP;
Norio Takeda, Matsudo, JP;
Mitsuo Miura, Matsudo, JP;
Yoshiyuki Aoki, Tokyo, JP;
Takao Kondo, Tokyo, JP;
Kaoru Tsuyuki, Tokyo, JP;
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423388 ;
Abstract
Hydrazine sulfate having a relatively large particle diameter and a high purity is produced by hydrolysis of benzophenoneazines by sulfuric acid having a concentration of 75% by weight or less in an amount of 1.1 times by mole or more the stoichiometric amount in a very high conversion and a high yield with less operational loss.