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. 18, 1994
Filed:
Dec. 22, 1992
Applicant:
Inventors:
Mitsuo Tanjo, Sendai, JP;
Toshio Ashitani, Niihama, JP;
Tetsuo Fujita, Niihama, JP;
Katsuhiro Sakata, Niihama, JP;
Mikitoshi Nakada, Ichihara, JP;
Assignee:
Sumitomo Chemical Company, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01F / ; C01B / ;
U.S. Cl.
CPC ...
423128 ; 423531 ; 423556 ; 423D / ;
Abstract
Aluminum sulfate that is less colored is prepared by adjusting the concentration of hydrogen peroxide in sulfuric acid to 0.1% by weight or less, and contacting the sulfuric acid with an alumina-containing compound.