Granted Patent
Utility
US 6,183,231 · App. 09/549,372
Clean-in-place gear pump
Inventor:
Drew Van Norman
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Apr 14, 2000
Inventor
Drew Van Norman
Assignee (at issue)
United Dominion 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.