Granted Patent
Utility
US 4,715,975 · App. 06/642,314
Oil containing dispersant VII olefin copolymer
Inventors:
Maria M. Kapusciniski, Benjamin J. Kaufman, Christopher S. Liu
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Aug 20, 1984
Inventors
Maria M. Kapusciniski
Benjamin J. Kaufman
Christopher S. Liu
Assignee (at issue)
Texaco 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.