Granted Patent
Utility
US 5,499,902 · App. 08/373,394
Environmentally safe pump including seal
Inventor:
Robert E. Rockwood
Patented Case
View Patent ↗
Granted: Mar 19, 1996
Filed: Jan 17, 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.