IP Library › Granted Patent US 5,441,109
Granted Patent Utility
US 5,441,109 · App. 08/229,870

Enzyme breakers for breaking fracturing fluids and methods of making and use thereof

Inventors: D. V. Satyanarayana Gupta, Bethicia B. Prasek, Richard D. Horn
Patented Case View Patent ↗
Granted: Aug 15, 1995 Filed: Apr 19, 1994
Inventors
D. V. Satyanarayana Gupta
Bethicia B. Prasek
Richard D. Horn
Assignee (at issue)
Western Company of North America

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 5,441,109
App. No.
08/229,870
Filed
1994-04-19
Granted
1995-08-15
Kind
A