Granted Patent
Utility
US 5,205,707 · App. 07/679,948
Ioric pump with cast impeller housing requiring three machined surfaces and one central piloting bore to control critical tolerances
Inventors:
John E. Smith, Dennis Koenig, William E. Ruhig, Jr.
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Apr 3, 1991
Inventors
John E. Smith
Dennis Koenig
William E. Ruhig, Jr.
Assignee (at issue)
COLTEC 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.