Granted Patent
Utility
US 5,217,632 · App. 07/880,650
Process for preparation and composition of stable aqueous solutions of boron zirconium chelates for high temperature frac fluids
Inventor:
Sharif Sharif
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: May 11, 1992
Inventor
Sharif Sharif
Assignee (at issue)
Zirconium Technology Corporation
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.