Granted Patent
Utility
US 5,686,066 · App. 08/723,247
Polyaspartic acid Zwitterionic derivatives, preparation processes thereof, hair-treating compositions and cosmetic compositions
Inventors:
Yukiko Harada, Hosei Shinoda, Makoto Sukegawa, Hiroaki Tamatani
Patented Case
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Granted: Nov 11, 1997
Filed: Sep 30, 1996
Inventors
Yukiko Harada
Hosei Shinoda
Makoto Sukegawa
Hiroaki Tamatani
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.