Granted Patent
Utility
US 4,859,754 · App. 07/260,261
Water and oil repellant having desoiling properties
Inventors:
Takashige Maekawa, Kazuya Oharu, Tomoko Sakaguchi
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Oct 20, 1988
Inventors
Takashige Maekawa
Kazuya Oharu
Tomoko Sakaguchi
Assignee (at issue)
ASAHI GLASS 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.