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:
Jan. 15, 1980
Filed:
May. 05, 1975
Applicant:
Inventor:
Willem F Borman, Evansville, IN (US);
Assignee:
General Electric Company, Pittsfield, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528309 ; 525243 ; 526 71 ; 528307 ;
Abstract
A novel melt polymerization process is disclosed for increasing the molecular weight of poly(1,4-butylene terephthalate). This process comprises adding a compound containing at least two aliphatic or cycloaliphatic hydroxyl groups to a low molecular weight poly(1,4-butylene terephthalate) and thereafter melting the polymer in a vacuum until the desired molecular weight is reached.