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. 25, 2000
Filed:
Aug. 15, 1997
Applicant:
Inventor:
Donald Ross Kelsey, Fulshear, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528271 ; 528176 ; 528193 ; 528194 ; 528272 ; 528286 ; 528287 ;
Abstract
Polytrimethylene terephthalate is prepared in a process which includes adding a hindered phenol and an aromatic organophosphite to the polymerization reaction mixture. The process generates a reduced level of acrolein and prepares an improved polyester product compared with processes without the phenol and organophosphite additives.
Kelsey, Donald. (2000). Process for preparing polytrimethylene terephthalate (U.S. Patent No. 6093786). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6093786
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile