Granted Patent
Utility
US 5,872,246 · App. 08/324,032
Ethyl guar
Inventors:
J. Richard Commander, Thomas G. Majewicz
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Oct 17, 1994
Inventors
J. Richard Commander
Thomas G. Majewicz
Assignee (at issue)
Aqualon 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.