Granted Patent
Utility
US 5,884,536 · App. 08/901,742
Valve packing extractor and valve gland cleaner
Inventor:
Raymond J. Durant
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Jul 28, 1997
Inventor
Raymond J. Durant
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.