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. 25, 1993
Filed:
Sep. 17, 1991
Applicant:
Inventors:
Assignee:
PCD Polymere Gesellschaft m.b.H., Schwechat-Mannsworth, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12P / ; C12N / ; C07L / ;
U.S. Cl.
CPC ...
435135 ; 435134 ; 435136 ; 435146 ; 435829 ; 203 14 ; 203 67 ; 528354 ; 528361 ; 528491 ; 528501 ; 560185 ;
Abstract
Process for extracting polyhydroxyalkanoates from the cell material of microorganisms by adding an organic solvent for the polyhydroxyalkanoate which is immiscible with water and which has a boiling point of below 100.degree. C., and, if appropriate, by adding water; stirring the resulting extraction mixture, if appropriate with refluxing; separating off the aqueous phase which contains the cell material in undissolved form from the organic phase; and injecting the organic phase into hot water, causing the dissolved polyhydroxyalkanoate to precipitate and the organic solvent to evaporate, and also isolating the precipitated polyhydroxyalkanoate flocs.