Granted Patent
Utility
US 5,700,395 · App. 08/525,725
Dispersants
Inventors:
Dean Thetford, John D. Schofield
Patented Case
View Patent ↗
Granted: Dec 23, 1997
Filed: Sep 25, 1995
Inventors
Dean Thetford
John D. Schofield
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.