Granted Patent
Utility
US 5,684,153 · App. 08/258,167
Process for the preparation of purine derivatives
Inventors:
Graham Richard Geen, Richard Jarvest
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: Jun 10, 1994
Inventors
Graham Richard Geen
Richard Jarvest
Assignee (at issue)
Beecham Group plc
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.