Granted Patent
Utility
US 5,944,319 · App. 08/915,720
Method of forming a metal to metal seal between two confronting faces of pressure containing bodies and a metal to metal seal
Inventor:
Nicholas Kohlman
Patented Case
View Patent ↗
Granted: Aug 31, 1999
Filed: Aug 21, 1997
Inventor
Nicholas Kohlman
Assignee (at issue)
Vanoil Equipment 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.