Granted Patent
Utility
US 4,741,773 · App. 06/860,569
Water repellent composition
Inventors:
Katsuhiko Kuroda, Toru Tagawa, Hiroo Katayama
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: May 7, 1986
Inventors
Katsuhiko Kuroda
Toru Tagawa
Hiroo Katayama
Assignee (at issue)
Mitsubishi Chemical Industries, 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.