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:
Nov. 04, 2003
Filed:
Apr. 26, 2002
Applicant:
Inventors:
Yuji Asakawa, Tokyo, JP;
Shin Asano, Tokyo, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 6/00 ; C08J 1/104 ; B01D 1/100 ;
U.S. Cl.
CPC ...
C08F 6/00 ; C08J 1/104 ; B01D 1/100 ;
Abstract
A container made of, e.g., polyethylene terephthalate is pulverized and decomposed in the presence of a catalyst by the use of a solvent such as an alcohol or glycol to obtain crude bishydroxyalkyl terephthalate. This crude bishydroxyalkyl terephthalate is then purified by filtration, a treatment with activated carbon, and a treatment with ion-exchange resins. The bishydroxyalkyl terephthalate thus obtained is condensed to produce a container or the like made of polyethylene terephthalate.
Quick Actions:
Asakawa, Yuji. (2003). Method of purifying bishydroxyalkyl terephthalate (U.S. Patent No. 6642350). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6642350
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile