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. 17, 1990
Filed:
Jun. 29, 1988
Applicant:
Inventor:
Dilip J Sakhpara, Newark, DE (US);
Assignee:
W. L. Gore & Assoc. Inc., Newark, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 59 ; 521914 ; 528 61 ; 528 66 ; 528 76 ;
Abstract
The invention relates to flexible breathable polyurethane coatings and films and to the prepolymers from which they are formed. These prepolymers are isocyanate-capped poly (alkylene oxide) glycol polyurethanes with low viscosities and low freezing points. The difunctional nature of the random copolymers of ethylene oxide and prepylene oxide added to simple diols provide the low viscosity and low freezing points; high levels of ethylene oxide in the polyol provides the breathability.