Granted Patent
Utility
US 3,991,900 · App. 05/618,457
Reservoir cover and canalizing means
Inventors:
Norman R. Burke, Drace W. Kutnewsky, Virgil C. Price, Dennis H. Gerber
Patented Case
View Patent ↗
Granted: Nov 16, 1976
Filed: Oct 1, 1975
Inventors
Norman R. Burke
Drace W. Kutnewsky
Virgil C. Price
Dennis H. Gerber
Assignee (at issue)
Burke Industries, 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.