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:
Oct. 14, 2008
Filed:
Sep. 30, 2003
Noriko Ogawa, Kobe, JP;
Kenji Miyamoto, Yokohama, JP;
Fumio Osakada, Okayama, JP;
Keiji Matsumoto, Nishinomiya, JP;
Noriko Ogawa, Kobe, JP;
Kenji Miyamoto, Yokohama, JP;
Fumio Osakada, Okayama, JP;
Keiji Matsumoto, Nishinomiya, JP;
Kaneka Corporation, Osaka, JP;
Abstract
The object of this invention is to provide a method for purifying PHA separated from PHA-containing microbial cells in high purity without incurring any serious decrease in molecular weight. The present invention provides a method for purifying a 3-hydroxyalkanoic acid copolymer produced by a microorganism, which comprises treating an aqueous suspension containing the 3-hydroxyalkanoic acid copolymer separated from a microorganism with a hydrogen peroxide while controlling the pH of said aqueous suspension by adding an alkali either continuously or intermittently.