Granted Patent
Utility
US 4,559,156 · App. 06/631,095
Process for dispersing particulate material in aqueous systems
Inventors:
Brian Greaves, Paul Ingham
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Jul 16, 1984
Inventors
Brian Greaves
Paul Ingham
Assignee (at issue)
Dearborn Chemical Company 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.