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, 2000
Filed:
Jun. 08, 1999
Applicant:
Inventors:
Kenneth P Yonek, McMurray, PA (US);
Yuliya Berezkin, Pittsburgh, PA (US);
Assignee:
Bayer Corporation, Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08K / ; C08L / ; C08L / ; C08L / ;
U.S. Cl.
CPC ...
524591 ; 524539 ; 524839 ; 524840 ; 524589 ; 524590 ;
Abstract
The present invention relates to a process for preparing aqueous polyurethane dispersions in a multi-step process by forming an NCO prepolymer by