Granted Patent
Utility
US 4,863,807 · App. 07/248,315
Multi-layered thermal insulating piston cap
Inventor:
Stephen Krasicky, Jr.
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Sep 19, 1988
Inventor
Stephen Krasicky, Jr.
Assignee (at issue)
Facet Enterprises, Incorporated
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.