Patent · US Expired

Hepatitis B surface antigen

US4088748A · kind A · utility

16Cited by
0References
11Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 4, 1977
Grant dateMay 9, 1978
Priority date—
Expiry dateMay 4, 1997

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC12N2730/10122
  • WIPO fieldBiotechnology
  • WIPO sectorChemistry

Abstract

Biological fluid containing hepatitis B surface antigen is concentrated using ammonium sulfate, and subjected to an isopycnic banding followed by rate zonal banding.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.