Granted Patent
Utility
US 5,362,408 · App. 07/912,983
High temperature gel stabilizer for fracturing fluids
Inventors:
Marek K. Pakulski, D. V. Satyanarayana Gupta
Patented Case
View Patent ↗
Granted: Nov 8, 1994
Filed: Jul 14, 1992
Inventors
Marek K. Pakulski
D. V. Satyanarayana Gupta
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.