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:
Mar. 18, 1980
Filed:
Apr. 12, 1978
Applicant:
Inventors:
Jean-Pierre Caspar, Le Teil, FR;
Bernard Lelong, Montelimar, FR;
Assignee:
Lafarge, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106110 ;
Abstract
The object of the present invention is a plaster obtained from phosphogypsum and its process of obtention. The plaster according to the invention contains phosphatic impurities which are fundamentally in the form of brushite and monetite of the formula CaHPO.sub.4, which corresponds in infra-red spectrometry to the appearance of a peak characteristic of this formula, said plaster having a normal setting time.