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. 23, 1977
Filed:
Jul. 21, 1975
Applicant:
Inventor:
Samuel V Houghtaling, Lakeland, FL (US);
Assignee:
Davy Powergas, Inc., Lakeland, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423320 ; 241 21 ; 423167 ;
Abstract
Wet process phosphoric acid is made by grinding phosphate rock as a slurry in water, and digesting the ground rock slurry with sulfuric acid which has been diluted by spent calcium sulfate wash water before being combined with the ground slurry.