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:
Jul. 31, 1979
Filed:
Jul. 01, 1976
Martin B Sheratte, Canoga Park, CA (US);
Other;
Abstract
Decomposiing polyurethane foams by treating such polyurethane materials with ammonia or ammonium hydroxide, preferably in the presence of a suitable organic solvent such as a glycol or polyol, or the decomposition product of a polyurethane. Treatment of the polyurethane material with ammonia or ammonium hydroxide, particularly in combination with such solvent, is carried out preferably at elevated temperature, and results in decomposition of the polyurethane. The resulting reaction product containing polyol fragments from such decomposition or depolymerization, can be incorporated with fresh polyurethane reactants, including polyisocyanate, or polyol and polyisocyanate, to produce new urethane polymer, thus permitting recovery and re-use of otherwise useless scrap polyurethane materials.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile