Granted Patent
Utility
US 5,880,314 · App. 08/875,265
Hydrochalcone derivatives, cosmetic compositions containing said derivatives and methods of producing the same
Inventors:
Tatsuro Shinomiya, Hiroko Kaminaga, Shohei Nozaki, Masahiro Sakamoto, Shigeharu Morimoto
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Jul 18, 1997
Inventors
Tatsuro Shinomiya
Hiroko Kaminaga
Shohei Nozaki
Masahiro Sakamoto
Shigeharu Morimoto
Assignee (at issue)
MITSUI CHEMICALS, 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.