Granted Patent
Utility
US 5,641,602 · App. 08/525,048
Block copolymer containing binder composition and electro photographic toner composition derived therefrom
Inventors:
Catherine Maris, Olivier Roumache, Hans F. Vermeire
Patented Case
View Patent ↗
Granted: Jun 24, 1997
Filed: Sep 8, 1995
Inventors
Catherine Maris
Olivier Roumache
Hans F. Vermeire
Assignee (at issue)
SHELL OIL 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.