Granted Patent
Utility
US 5,350,528 · App. 07/861,801
Method of supporting fractures in geological formations and hydraulic fluid composition for same
Inventors:
John A. Westland, Glenn S. Penny, R. Scott Stephens, Alan R. Winslow
Patented Case
View Patent ↗
Granted: Sep 27, 1994
Filed: Jun 12, 1992
Inventors
John A. Westland
Glenn S. Penny
R. Scott Stephens
Alan R. Winslow
Assignee (at issue)
Weyerhaeuser NR Company
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.