Granted Patent
Utility
US 6,425,411 · App. 09/855,735
Oil sealant-preserving drain odor trap
Inventor:
Ditmar L. Gorges
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: May 14, 2001
Inventor
Ditmar L. Gorges
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.