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. 20, 1983
Filed:
Sep. 29, 1982
Applicant:
Inventors:
Jay W Palmer, Tampa, FL (US);
John C Gaynor, Des Plaines, IL (US);
Assignee:
United States Gypsum Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C01F / ; C01G / ; C01B / ;
U.S. Cl.
CPC ...
423555 ; 106109 ; 423 11 ; 423 18 ; 423166 ; 423170 ; 4233 / ;
Abstract
A process for reducing radioactive contamination of phosphogypsum. Phosphogypsum containing radioactive material is calcined to form hemihydrate crystals carrying the radioactive contaminants, and a portion of the crystals is converted to substantially radiation-free gypsum crystals which are readily separated from the hemihydrate crystal relics containing substantially all of the radioactive contamination.
Palmer, Jay. (1983). Process for purifying phosphogypsum (U.S. Patent No. 4421731). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4421731
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile