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:
May. 26, 1998
Filed:
May. 20, 1997
Hiroshi Maeda, Osaka, JP;
Kunihiko Shimizu, Osaka, JP;
Yuji Kurishiro, Osaka, JP;
Eiichi Kawada, Tokyo, JP;
Kazuhisa Fujisawa, Kobe, JP;
Kabushiki Kaisha Kobe Seiko Sho, Kobe, JP;
Abstract
The present invention provides a method capable of continuously efficiently producing a 2-hydroxycarboxylic acid oligomer while effectively removing the water contained in a raw material and the water produced by dehydration reaction. In production of a 2-hydroxycarboxylic acid oligomer by supplying a 2-hydroxycarboxylic acid to a reaction system, a dehydration system is provided between a raw material supply system and a polymerization reaction system so as to remove the water contained in the raw material and the water produced in the polymerization reaction system. As a result, the raw material in the dehydration system is concentrated and then supplied to the polymerization reaction system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile