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:
Nov. 14, 1978
Filed:
Apr. 01, 1977
Applicant:
Inventor:
John R White, Wadsworth, OH (US);
Assignee:
The Goodyear Tire & Rubber Company, Akron, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ; C08J / ;
U.S. Cl.
CPC ...
521 51 ; 152152 ; 152158 ; 152310 ; 1523 / ; 152167 ; 521159 ; 521176 ;
Abstract
A zero pressure device is composed of either a microcellular or homogeneous polyurethane made by reacting an organic polyisocyanate with at least three polyols, a monomeric polyol of 2 to 3 hydroxyls having a molecular weight less than 250, a polyether triol having a molecular weight of 4600 to 6000 and a polyether glycol having a molecular weight of 3500 to 4200. When the zero pressured device is a run-flat ring for a tire wheel assembly, it has an average density of 60 to 65 pounds per cubic foot and 30 to 42 pounds per cubic foot when it is a tire.