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. 19, 2014
Filed:
Dec. 11, 2009
Applicants:
Robert B. Osborne, Wilmington, DE (US);
Paul S. Pearlman, Thornton, PA (US);
Yanhui Sun, Wilmington, DE (US);
Inventors:
Robert B. Osborne, Wilmington, DE (US);
Paul S. Pearlman, Thornton, PA (US);
Yanhui Sun, Wilmington, DE (US);
Assignee:
INVISTA North America S.à r.l., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 6/00 (2006.01); C08G 65/20 (2006.01); C07D 307/08 (2006.01); C08G 65/32 (2006.01);
U.S. Cl.
CPC ...
C07D 307/08 (2013.01); C08G 65/20 (2013.01); C08G 2650/12 (2013.01); C08G 2650/34 (2013.01); C08G 65/32 (2013.01); C08G 2650/10 (2013.01);
Abstract
The present invention provides a method for depolymerization of a mixture comprising oligomeric cyclic ethers resulting from copolymerization of at least one tetrahydrofuran and at least one other cyclic ether to recover tetrahydrofuran monomer.