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. 08, 1979
Filed:
May. 18, 1978
Dieter Stahl, Kriftel, DE;
Ernst Puchel, Hofheim, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Foamed gypsum is produced by mixing gypsum with water in the presence of additives serving for liquefying the gypsum and for adjusting the starting period, and by adding thereto a mixture of isocyanate compounds and polyurethane preadducts. After a starting period of about five minutes a foaming process occurs, which is completed after about 20 minutes and furnishes a foamed gypsum after setting. The foamed gypsum has a density from 0.45 to 0.8 g/cc, whereas unfoamed gypsum has a density of 1.66 g/cc. The process may be performed in special molds, so that after setting specially formed elements are obtained, e.g. sandwich elements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile