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. 26, 2002
Filed:
Nov. 02, 1999
Applicant:
Inventors:
Soon-Jae Park, Daejeon, KR;
Young-Mee Lee, Daejeon, KR;
Kyung-Hee Yoon, Daejeon, KR;
Kook-Jin Lim, Daejeon, KR;
Young-Sun Kwon, Daejeon, KR;
Assignee:
LG Chemical Limited, , KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C12N 7/02 ;
U.S. Cl.
CPC ...
C12N 7/02 ;
Abstract
A process for purifying hepatitis B viral surface antigen comprising the preS2 peptide from the cells of a recombinant organism is carried out by a sequence of steps which includes the step of disrupting the cells using a buffer containing a chaotropic salt to obtain a cell homogenate and the step of alkalifying the cell homogenate to a pH ranging from 11.0 to 13.5.