IP Library › Granted Patent US 5,363,928
Granted Patent Utility
US 5,363,928 · App. 08/057,111

Method of drilling with fluid including bees wings and fluid loss additive therefor

Inventor: James R. Wittliff
Patented Case View Patent ↗
Granted: Nov 15, 1994 Filed: May 4, 1993
Inventor
James R. Wittliff
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,363,928
App. No.
08/057,111
Filed
1993-05-04
Granted
1994-11-15
Kind
A