Granted Patent
Utility
US 5,642,888 · App. 08/570,001
Temperature and pressure resistant rotating seal construction for a pump
Inventor:
Robert E. Rockwood
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Dec 8, 1995
Inventor
Robert E. Rockwood
Assignee (at issue)
Environamics Corporation
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.