Granted Patent
Utility
US 5,441,340 · App. 08/308,477
Method for controlling the density of a well fracturing slurry
Inventors:
Greg L. Cedillo, Thomas A. Robertson, Frank C. South, Jr., Robert Allen Baten, Bruce A. Vicknair
Patented Case
View Patent ↗
Granted: Aug 15, 1995
Filed: Sep 19, 1994
Inventors
Greg L. Cedillo
Thomas A. Robertson
Frank C. South, Jr.
Robert Allen Baten
Bruce A. Vicknair
Assignee (at issue)
Stewart & Stevenson Services, 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.