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:
Dec. 24, 1991
Filed:
Jan. 24, 1990
Applicant:
Inventor:
Joseph P Balint, Jr, Seattle, WA (US);
Assignee:
Imre Corporation, Seattle, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07K / ; C07K / ; C07K / ; C07K / ;
U.S. Cl.
CPC ...
530350 ; 530413 ; 530416 ;
Abstract
Affinity-purified protein A preparations are contacted with a suitable anionic exchange material in order to remove trace contamination. Staphylococcal enterotoxin B (SEB) and other proteinaceous contaminants are removed by passing such affinity-purified protein A preparations through a DEAE-cellulose column and thereafter selectively eluting the protein A to separate the contaminants. Very high purity protein A composition are thus obtained, typically having a contaminant concentration of about 5 weight % or below, with below about 0.001 weight % SEB.