Granted Patent
Utility
US 5,466,092 · App. 08/142,516
Form-drain filter
Inventors:
Christopher G. Semenza, Richard L. Tremblay
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Oct 25, 1993
Inventors
Christopher G. Semenza
Richard L. Tremblay
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.