Granted Patent
Utility
US 4,398,955 · App. 06/276,516
Dispersions
Inventors:
James F. Stansfield, James Toole, Arthur Topham
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Jun 23, 1981
Inventors
James F. Stansfield
James Toole
Arthur Topham
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES 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.