Granted Patent
Utility
US 6,470,877 · App. 09/640,199
Heating apparatus
Inventor:
Michael Waters
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Aug 16, 2000
Inventor
Michael Waters
Assignee (at issue)
Blue Rhino Corporation
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.