Granted Patent
Utility
US 6,408,631 · App. 09/780,026
Wave spring loaded split seal system
Inventor:
Russell M. Sylvia
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Feb 9, 2001
Inventor
Russell M. Sylvia
Assignee (at issue)
Helix Technology 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.