Granted Patent
Utility
US 5,908,072 · App. 08/850,525
Non-metallic centralizer for casing
Inventor:
Samuel P. Hawkins, III
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: May 2, 1997
Inventor
Samuel P. Hawkins, III
Assignee (at issue)
FRANK'S INTERNATIONAL, LLC
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.