Granted Patent
Utility
US 5,091,016 · App. 07/542,522
Method for dispersing sediment contained in a storage tank
Inventors:
Richard W. Krajicek, Robert R. Cradeur
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Jun 22, 1990
Inventors
Richard W. Krajicek
Robert R. Cradeur
Assignee (at issue)
Servi-Tech, 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.