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:
Aug. 30, 1983
Filed:
Mar. 08, 1982
Applicant:
Inventors:
Friedrich Engelhardt, Frankfurt am Main, DE;
Rolf Kleber, Neu-Isenburg, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525 61 ; 81156 ; 81157 ; 4273899 ;
Abstract
Polyvinyl alcohol modified by reaction with formaldehyde and amidosulfonic acid at a pH value of 4 to 7, which value is established by the addition of an organic amine. This modified polyvinyl alcohol is suitable for use as a sizing agent for yarns.