Granted Patent
Utility
US 6,835,698 · App. 10/169,736
Ethylene-base copolymers, process for producing the same and lubricating oil compositions containing the same
Inventors:
Tatsuya Egawa, Yutaka Minami
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: Jul 16, 2002
Inventors
Tatsuya Egawa
Yutaka Minami
Assignee (at issue)
Idemitsu Petrochemical Co., Ltd.
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.