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:
Jul. 29, 2014
Filed:
Jun. 05, 2009
Applicant:
Carl Steven Nichols, Waxhaw, NC (US);
Inventor:
Carl Steven Nichols, Waxhaw, NC (US);
Assignee:
DAK Americas Mississippi Inc., Bay St. Louis, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 63/00 (2006.01); B01J 27/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for making polyethylene terephthalate resin in which a titanium-nitride polycondensation catalyst is introduced during the initial stages of esterification or transesterification. The titanium-nitride polycondensation catalyst may be added to a mixture containing a terephthalate component and a diol component during the formation of a polyethylene terephthalate precursor. Subsequent polycondensation of the polyethylene terephthalate precursor forms a polyethylene terephthalate polymer.