Granted Patent
Utility
US 4,998,954 · App. 07/467,568
Isokinetic probe and pressure reduction assembly
Inventor:
William Burr
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: Jan 19, 1990
Inventor
William Burr
Assignee (at issue)
Union Carbide Industrial Gases Technology 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.