Granted Patent
Utility
US 5,141,986 · App. 07/805,770
Block copolymer dispersions and process to prepare block copolymer dispersions
Inventors:
Jeffrey G. Southwick, Kirk Herbert Raney, John K. Borchardt
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Dec 12, 1991
Inventors
Jeffrey G. Southwick
Kirk Herbert Raney
John K. Borchardt
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.