Granted Patent
Utility
US 5,328,627 · App. 07/508,744
Fire resistant hydraulic fluids
Inventors:
Joseph M. Bohen, Paul Tubbs
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Apr 12, 1990
Inventors
Joseph M. Bohen
Paul Tubbs
Assignee (at issue)
Elf Atochem North America, 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.