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:
Mar. 30, 2021
Filed:
Dec. 19, 2018
Applicant:
Covestro Llc, Pittsburgh, PA (US);
Inventors:
Edward P. Browne, Cologne, DE;
Anthony R. Loveday, Weirton, WV (US);
Jose F. Pazos, Charleston, WV (US);
Assignee:
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/12 (2006.01); C08G 65/26 (2006.01);
U.S. Cl.
CPC ...
C08G 65/2663 (2013.01); C08G 65/2696 (2013.01); C08G 2650/22 (2013.01);
Abstract
This invention relates to an improved process for the preparation of a high molecular weight polyoxyalkylene polyether polyol by the continuous addition of starter (CAOS) process. This process enables a shorter cycle time while maintaining a low viscosity in high molecular weight polyoxyalkylene polyether polyols.