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. 04, 1979
Filed:
Jul. 06, 1976
Applicant:
Inventor:
Hans-Friedrich Kurandt, Luneburg, DE;
Assignee:
Veba-Chemie Aktiengesellschaft, Gelsenkirschen-Buer, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C05B / ;
U.S. Cl.
CPC ...
71 36 ; 71 39 ; 71 40 ; 423319 ; 423320 ;
Abstract
Phosphoric acid with a high fertilizer-nutrient content is produced by decomposing phosphate rock with nitric acid followed by precipitation of calcium ions with sulfate. The steps of the process are as follows: