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. 17, 1979
Filed:
May. 12, 1978
Applicant:
Inventor:
Dale J Herron, Minneapolis, MN (US);
Assignee:
Bepex Corporation, Santa Rosa, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528272 ; 528309 ;
Abstract
A process for the continuous production of high molecular weight polyethylene terephthalate wherein the granular polymer having an intrinsic viscosity of at least 0.4 is crystallized, dried and polymerized in the solid phase by polycondensation. Two methods of crystallization are described which aid the process in overcoming problems associated with sticking in the polymerization stage. The method is characterized by polycondensation at a temperature greater than the crystallization temperature.
Quick Actions:
Herron, Dale. (1979). Process for solid phase polymerization of polyester (U.S. Patent No. 4161578). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4161578
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile