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:
Jun. 28, 1977
Filed:
Sep. 25, 1975
Akizo Keshi, Takatsuki, JA;
Katsuhisa Kodama, Nishinomiya, JA;
Ichiro Takemura, Takatsuki, JA;
Yoshihiko Tairaka, Sakai, JA;
Kunio Yoshinaga, Ikeda, JA;
Takeda Chemical Industries, Ltd., Osaka, JA;
Abstract
Polyetherpolyols useful in preparing rigid polyurethane foam excellent in dimensional stability and inflammability. These polyetherpolyols are obtained by reacting alkylene oxide with compounds containing active hydrogen atoms, part or all of which comprise the reaction product obtained by heating the distillation residue secured as a byproduct in the distillation process of a crude polyisocyanate in the presence of (1) water, alcohols and/or amines and (2) hydroxides or oxides of alkali metals or alkaline earth metals and/or monoalkanolamines.