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:
Feb. 22, 1994
Filed:
Oct. 31, 1991
Applicant:
Inventor:
Charles W Goodrich, Waynesboro, VA (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ; C08K / ; C08L / ; C08G / ;
U.S. Cl.
CPC ...
524121 ; 524126 ; 528 51 ;
Abstract
Certain 4,4'-biphenylene diphosphonites in solutions of polyurethaneurea polymer, in concentrations of 0.05 to 1.5% based on dry polymer weight, protect the solutions from undesired changes in solution viscosity.