Granted Patent
Utility
US 5,325,921 · App. 07/964,413
Method of propagating a hydraulic fracture using fluid loss control particulates
Inventors:
Michael H. Johnson, Hang T. Nguyen, Lewis B. Ledlow
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Oct 21, 1992
Inventors
Michael H. Johnson
Hang T. Nguyen
Lewis B. Ledlow
Assignee (at issue)
Baker Hughes Holdings 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.