Granted Patent
Utility
US 6,595,524 · App. 09/669,973
Pressure regulating buffer seal
Inventor:
Daniel K. Zitting
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Sep 25, 2000
Inventor
Daniel K. Zitting
Assignee (at issue)
Macrotech Polyseal, 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.