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:
Aug. 31, 1976
Filed:
May. 07, 1974
Applicant:
Inventors:
Assignee:
Toyo Soda Manufacturing Co., Ltd., Shin-nanyo, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4233 / ; 423 63 ;
Abstract
Pure phosphoric acid is prepared from crude wet process phosphoric acid which contains pentavalent vanadium compounds by first extracting the crude acid with an alcohol of limited water solubility and then washing the extracted phosphoric acid solution with aqueous phosphoric acid, in the presence of an agent for reducing the pentavalent vanadium compounds.
Toshimitsu, Itaru. (1976). Phosphoric acid purification (U.S. Patent No. 3978196). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3978196
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile