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. 03, 1978
Filed:
Sep. 02, 1977
Applicant:
Inventors:
William J McAleer, Ambler, PA (US);
Edward H Wasmuth, Telford, PA (US);
Assignee:
Merck & Co., Inc., Rahway, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424 89 ;
Abstract
An improved process for the preparation of hepatitis B antigen by subjecting biological fluid containing heptatitis B surface antigen to isopycanic banding wherein the step gradient is NaBr. Faster and more economical processing is obtained by multiple loading of the step gradient, either NaBr or conventional gradients.