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:
Mar. 20, 1990
Filed:
Jun. 30, 1989
Applicant:
Inventors:
Paul A Holmes, Northallerton, GB;
Guan B Lim, Stockton-on-Tees, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12N / ; C12P / ; C12P / ;
U.S. Cl.
CPC ...
435259 ; 435134 ; 435141 ; 435271 ; 435829 ; 435874 ;
Abstract
An aqueous suspension of micro-organism cells containing a 3-hydroxybutyrate polymer are subjected to a proteolytic enzyme digestion and/or a surfactant digestion in order to solubilise cell material other than the 3-hydroxybutyrate polymer. Prior to, or during the digestion, but before any proteolytic enzyme digestion step, the suspension is heated to at least 80.degree. C. to denature nucleic acids which otherwise hinder separation of the 3-hydroxybutyrate polymer containing residue from the suspension.