Granted Patent
Utility
US 4,455,155 · App. 06/403,783
Electrostatic collecting assembly
Inventors:
James E. Wooldridge, Karl L. Westlin
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: Jul 30, 1982
Inventors
James E. Wooldridge
Karl L. Westlin
Assignee (at issue)
Allis-Chalmers Corporation
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.