Granted Patent
Utility
US 5,560,907 · App. 08/403,174
Whitening embellisher
Inventors:
Itaru Sakai, Kana Satoh, Tomohide Tanaka, Yutaka Morita, Takashi Hibi, Yoshio Tanabe, Shigemitsu Osawa, Yasushi Tomita
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: Mar 13, 1995
Inventors
Itaru Sakai
Kana Satoh
Tomohide Tanaka
Yutaka Morita
Takashi Hibi
Yoshio Tanabe
Shigemitsu Osawa
Yasushi Tomita
Assignee (at issue)
Eisai 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.