Granted Patent
Utility
US 6,721,055 · App. 10/020,789
Particle dispersion determinator
Inventors:
James Hatfield, Peter B. Howard, Edmund J. Lawson, Alastair Orr Mackenzie
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Dec 14, 2001
Inventors
James Hatfield
Peter B. Howard
Edmund J. Lawson
Alastair Orr Mackenzie
Assignee (at issue)
Tioxide Group Services 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.