Granted Patent
Utility
US 6,350,422 · App. 09/575,518
Sorbent compositions
Inventors:
Gyanesh P. Khare, Donald R. Engelbert
Patented Case
View Patent ↗
Granted: Feb 26, 2002
Filed: May 22, 2000
Inventors
Gyanesh P. Khare
Donald R. Engelbert
Assignee (at issue)
Phillips Petroleum 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.