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:
Sep. 14, 1982
Filed:
Apr. 27, 1981
Applicant:
Inventors:
Robert A Long, Bradford, PA (US);
Albert K Fan, Bradford, PA (US);
Assignee:
GTE Products Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423308 ;
Abstract
A continuous process for manufacture of brushite, CaHPO.sub.4.2H.sub.2 O, is disclosed. Calcium and phosphate ions are mixed in a container to produce brushite precipitate, which is then continuously introduced into second and third containers where the pH is raised to reduce brushite solubility. The brushite is then filtered in a continuous process, washed, refiltered, and rewashed before being converted to anhydrous calcium hydrogen phosphate.