Granted Patent
Utility
US 5,900,544 · App. 08/907,835
System and method for detecting upward growth of a hydraulic subterranean fracture in real time
Inventors:
Xiaowei Weng, Kirk M. Bartko
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Aug 14, 1997
Inventors
Xiaowei Weng
Kirk M. Bartko
Assignee (at issue)
Atlantic Richfield 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.