Granted Patent
Utility
US 4,230,621 · App. 05/901,952
Steroid derivatives and their use in radioimmunoassays
Inventors:
Jack Bernstein, Ravi K. Varma, B. Richard Vogt, Frank L. Weisenborn
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: May 1, 1978
Inventors
Jack Bernstein
Ravi K. Varma
B. Richard Vogt
Frank L. Weisenborn
Assignee (at issue)
E.R. SQUIBB & SONS. INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.