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:
May. 22, 2007
Filed:
Mar. 05, 2002
Applicants:
Daniel Martin, Lyons, FR;
Robert Garcin, L'Isle d'Abeau, FR;
Inventors:
Daniel Martin, Lyons, FR;
Robert Garcin, L'Isle d'Abeau, FR;
Assignee:
Lafarge Platres, Avignon, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 67/20 (2006.01); C04B 24/16 (2006.01); C04B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Process for the manufacture of plasterboards exhibiting a core density of less than 0.77 comprising the stages of the formation of a foam from water and a surfactant composed of at least one alkyl sulphate of formula H(CH)OSOM, in which n is a number between 6 and 16, M is a monovalent cation and the mean number of carbon atoms nis from 9 to 10, and the introduction of the foam obtained into a plaster slurry, characterized in that the amount of surfactant introduced does not exceed 0.32 g/l of plaster slurry. Application to the manufacture of lightened plasterboards.