Granted Patent
Utility
US 6,693,786 · App. 09/872,295
Modification of ice friction in transportation systems
Inventor:
Victor F. Petrenko
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Jun 1, 2001
Inventor
Victor F. Petrenko
Assignee (at issue)
THE TRUSTEES OF DARTMOUTH COLLEGE
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.