Granted Patent
Utility
US 5,692,250 · App. 08/288,441
Vacuum toilet system with treated rinse liquid
Inventors:
Sven Oldfelt, Gary L. Stahl, Paul L. Dubler, Lars Erik A. E. Glas, Anders G. Ostman
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Aug 9, 1994
Inventors
Sven Oldfelt
Gary L. Stahl
Paul L. Dubler
Lars Erik A. E. Glas
Anders G. Ostman
Assignee (at issue)
Oy Wartsila Ab
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.