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. 27, 2012
Filed:
Oct. 31, 2008
Applicants:
Mark Andrew Harmer, Landenberg, PA (US);
Christian Hoffmann, Newark, DE (US);
Scott Christopher Jackson, Wilmington, DE (US);
Edward R. Murphy, Wilmington, DE (US);
Rupert Spence, Kingston, CA;
Inventors:
Mark Andrew Harmer, Landenberg, PA (US);
Christian Hoffmann, Newark, DE (US);
Scott Christopher Jackson, Wilmington, DE (US);
Edward R. Murphy, Wilmington, DE (US);
Rupert Spence, Kingston, CA;
Assignee:
E I du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 6/06 (2006.01); C08F 6/12 (2006.01); C08G 65/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof having a number-average molecular weight of at least about 250 g/mole by a polycondensation reaction using at least one acid catalyst.