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. 03, 2015
Filed:
Jun. 23, 2004
Applicants:
Winfried Johannes Josef Spikermann, Bodenwerder, DE;
Kane Ian Ironside, East Leake, GB;
Inventors:
Winfried Johannes Josef Spikermann, Bodenwerder, DE;
Kane Ian Ironside, East Leake, GB;
Assignee:
BPB Limited, Slough, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 11/00 (2006.01); G10K 11/162 (2006.01); B29C 39/00 (2006.01); E04B 1/84 (2006.01); C04B 11/26 (2006.01); C04B 18/04 (2006.01); C04B 28/14 (2006.01); B29C 39/14 (2006.01); C04B 111/00 (2006.01);
U.S. Cl.
CPC ...
C04B 11/002 (2013.01); E04B 1/8409 (2013.01); G10K 2210/118 (2013.01); C04B 11/264 (2013.01); C04B 18/0445 (2013.01); G10K 11/162 (2013.01); B29C 39/003 (2013.01); C04B 28/145 (2013.01); C04B 2111/0062 (2013.01);
Abstract
Gypsum plasterboard is produced by combining calcium sulphate hemihydrate (stucco) with water to form an aqueous slurry. Uncalcined gypsum having a specific surface area below 0.3 m/g is added to the slurry and the slurry is discharged onto a support so as to form a sheet of gypsum plasterboard.