Granted Patent
Utility
US 5,810,045 · App. 08/768,104
Valve device for introducing particulate materials into a high pressure air stream
Inventor:
Martin Evans
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Dec 16, 1996
Inventor
Martin Evans
Assignee (at issue)
Bulldog Technologies U.S.A., Inc.
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.