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. 09, 2022
Filed:
Aug. 10, 2018
Applicants:
Prayon Technologies, Engis, BE;
Raphael Etienne Lederer, Scottsdale, AZ (US);
Robert Edouard Lederer, Scottsdale, AZ (US);
Inventors:
Assignee:
PRAYON TECHNOLOGIES, Engis, BE;
Primary Examiner:
Int. Cl.
CPC ...
C01B 25/32 (2006.01);
U.S. Cl.
CPC ...
C01B 25/324 (2013.01); C01B 25/327 (2013.01);
Abstract
Process of acid attack with sulphuric acid of a phosphate source comprising calcium or not comprising calcium for a predetermined time period ranging from 20 to 180 minutes in the conditions wherein the molar ratio of sulphate from the sulphuric acid and possibly from the phosphate source to the calcium present in the phosphate source ranges from 0.6 to 0.8, and the content in POin the attack tank is of less than 6%.