Granted Patent
Utility
US 4,550,646 · App. 06/678,189
Method and arrangement for retaining cylinder liners in a reciprocating pump
Inventor:
John E. Miller
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Dec 4, 1984
Inventor
John E. Miller
Assignee (at issue)
Dresser Industries, 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.