Granted Patent
Utility
US 5,162,417 · App. 07/677,904
Gelled acidizer composition
Inventors:
Jui-Chang Chuang, Jenn S. Shih, Joseph H. Y. Niu
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Apr 1, 1991
Inventors
Jui-Chang Chuang
Jenn S. Shih
Joseph H. Y. Niu
Assignee (at issue)
ISP INVESTMENTS 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.