Granted Patent
Utility
US 5,753,022 · App. 08/596,179
Process
Inventors:
John D. Schofield, Dean Thetford
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Feb 5, 1996
Inventors
John D. Schofield
Dean Thetford
Assignee (at issue)
Zeneca Limited
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.