Granted Patent
Utility
US 6,558,141 · App. 09/833,277
Packing assembly and reciprocating plunger pump incorporating same
Inventors:
Kerry G. Vonalt, Jonathan T. Wiechers
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Apr 12, 2001
Inventors
Kerry G. Vonalt
Jonathan T. Wiechers
Assignee (at issue)
Ingersoll-Rand Company
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.