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:
Sep. 11, 2018
Filed:
Mar. 11, 2015
Furanix Technologies B.v., Amsterdam, NL;
Jeffrey John Kolstad, Amsterdam, NL;
Gerardus Johannes Maria Gruter, Amsterdam, NL;
Matheus Adrianus Dam, Amsterdam, NL;
Jesper Gabriël van Berkel, Amsterdam, NL;
Robert Joseph Schiavone, Matthews, NC (US);
Marion L. Andrews, Darlington, SC (US);
Synvina C.V., Amsterdam, NL;
Abstract
The molecular weight of a semi-crystalline starting polyester comprising ethylene 2,5-furandicarboxylate units is enhanced by heating the semi-crystalline starting polyester, having a melting point Tm, at a temperature in the range of (Tm-40° C.) to Tm to obtain a solid stated polyester, where the semi-crystalline starting polyester has an intrinsic viscosity of at least 0.45 dL/g, and an amount of carboxylic acid end groups in the range of 15 to 122 meq/kg.