Granted Patent
Utility
US 5,223,416 · App. 07/677,175
Process for producing R(-)-mandelic acid and derivatives thereof
Inventors:
Takakazu Endo, Koji Tamura
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Mar 29, 1991
Inventors
Takakazu Endo
Koji Tamura
Assignee (at issue)
Nitto Chemical Industry 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.