Granted Patent
Utility
US 5,405,903 · App. 08/208,414
Process for the preparation of a block copolymer blend
Inventors:
Jeroen Van Westrenen, Jacqueline M. Veurink, Arie Van Dongen, Antonius A. Broekhuis
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Mar 9, 1994
Inventors
Jeroen Van Westrenen
Jacqueline M. Veurink
Arie Van Dongen
Antonius A. Broekhuis
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.