Granted Patent
Utility
US 4,436,155 · App. 06/383,746
Well cleanup and completion apparatus
Inventor:
Emmet F. Brieger
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Jun 1, 1982
Inventor
Emmet F. Brieger
Assignee (at issue)
Geo Vann, 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.