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:
Jan. 01, 2013
Filed:
Dec. 17, 2010
Applicants:
Christian Hoffmann, Newark, DE (US);
Scott Christopher Jackson, Wilmington, DE (US);
Edward R. Murphy, Wilmington, DE (US);
Bhuma Rajagopalan, Wilmington, DE (US);
Inventors:
Christian Hoffmann, Newark, DE (US);
Scott Christopher Jackson, Wilmington, DE (US);
Edward R. Murphy, Wilmington, DE (US);
Bhuma Rajagopalan, Wilmington, DE (US);
Assignee:
E I du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
Processes for producing polytrimethylene ether glycol and copolymers thereof are provided wherein, by condensing and recycling at least a portion of the vapor phase produced as the reaction progresses, the yield loss and polymer color are reduced.