Granted Patent
Utility
US 6,449,842 · App. 09/678,176
Powder for piston-ring installation
Inventor:
C. William Yancer
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Sep 28, 2000
Inventor
C. William Yancer
Assignee (at issue)
Total Seal, Inc.
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.