Granted Patent
Utility
US 6,423,798 · App. 09/783,498
Copolymers of maleic anhydride or acid and fluorinated oleffins
Inventors:
Robert Clayton Wheland, Paul Douglas Brothers, Colin Anolick, Charles W. Stewart
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Feb 14, 2001
Inventors
Robert Clayton Wheland
Paul Douglas Brothers
Colin Anolick
Charles W. Stewart
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.