Granted Patent
Utility
US 6,021,787 · App. 09/037,672
Method for cleaning vessels during service
Inventor:
Robert Luke
Patented Case
View Patent ↗
Granted: Feb 8, 2000
Filed: Mar 10, 1998
Inventor
Robert Luke
Assignee (at issue)
Production Management 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.