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:
Dec. 09, 2008
Filed:
Oct. 16, 2002
Applicants:
Takuo Nakao, Tochigi, JP;
Tetsuya Chikatsune, Ehime, JP;
Minoru Nakashima, Yamaguchi, JP;
Minoru Suzuki, Ehime, JP;
Hiroki Nagano, Ehime, JP;
Inventors:
Takuo Nakao, Tochigi, JP;
Tetsuya Chikatsune, Ehime, JP;
Minoru Nakashima, Yamaguchi, JP;
Minoru Suzuki, Ehime, JP;
Hiroki Nagano, Ehime, JP;
Assignee:
Teijin Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 11/22 (2006.01); C08J 11/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
A through process comprising depolymerization reaction of used PET bottles with EG, recovering DMT by ester interchange reaction with MeOH, obtaining terephthalic acid by hydrolysis of the recovered DMT, and manufacturing a PET polymer which can be used for manufacturing PET bottles again by using the terephthalic acid.