Granted Patent
Utility
US 6,485,027 · App. 09/240,106
Surface heat treatment of piston rings
Inventors:
Olivier Carrie, Jean-Marc Staerck, Christophe Maerky, Olivier Laine
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Jan 29, 1999
Inventors
Olivier Carrie
Jean-Marc Staerck
Christophe Maerky
Olivier Laine
Assignee (at issue)
DANA LIMITED
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.