Granted Patent
Utility
US 5,039,521 · App. 07/295,734
Immune cell proliferation inhibitors
Inventors:
Anthony Bolton, Alan Drizen
Patented Case
View Patent ↗
Granted: Aug 13, 1991
Filed: Jan 11, 1989
Inventors
Anthony Bolton
Alan Drizen
Assignee (at issue)
Hyal Pharmaceutical Corporation
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.