Granted Patent
Utility
US 6,691,939 · App. 10/163,608
Pressure differential material transport and disposal system
Inventor:
Richard Grimes
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Jun 5, 2002
Inventor
Richard Grimes
Assignee (at issue)
Tommin Enterprises, LLC
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.