Granted Patent
Utility
US 5,484,028 · App. 08/292,258
Method of drilling with fluid including nut cork and drilling fluid additive
Inventor:
Ron A. Rose
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Aug 18, 1994
Inventor
Ron A. Rose
Assignee (at issue)
Grinding & Sizing Company 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.