Granted Patent
Utility
US 6,200,461 · App. 09/186,832
Method for inhibiting polymerization of ethylenically unsaturated hydrocarbons
Inventor:
Sherif Eldin
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Nov 5, 1998
Inventor
Sherif Eldin
Assignee (at issue)
Betzdearborn, Inc.
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.