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:
Oct. 16, 1990
Filed:
May. 22, 1989
Applicant:
Inventors:
Yasuhisa Kuriyama, Yokkaichi, JP;
Shuuzabu Sakaguchi, Toride, JP;
Toshiaki Kohzaki, Ushiku, JP;
Syoichi Nito, Yokkaichi, JP;
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C01B / ;
U.S. Cl.
CPC ...
203 29 ; 203 12 ; 203 33 ; 203 53 ; 203 71 ; 203 73 ; 203 74 ; 203 75 ; 203 78 ; 203 81 ; 203 82 ; 203 84 ; 423407 ; 568383 ;
Abstract
Provided by this invention is a process for producing a purified hydrazine hydrate having a low total organic carbon concentration and which involves: