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. 18, 1986
Filed:
Jul. 15, 1985
Applicant:
Inventors:
Robert T Beinor, Uniontown, OH (US);
William M Cole, Norton, OH (US);
Assignee:
The Firestone Tire & Rubber Co., Akron, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08C / ;
U.S. Cl.
CPC ...
528930 ; 528933 ;
Abstract
A method and composition are disclosed wherein guayule rubber is fractionated into desirable weight average molecular weight fractions by a desired solvent system. Oftentime, a plurality of fractionating steps is utilized wherein the desirable molecular weight rubber fraction is precipitated or extracted. High weight average molecular weight rubbers having usually less than 4% by weight of resin content therein are generally desirable because of their favorable physical properties.