Granted Patent
Utility
US 4,656,306 · App. 06/803,162
Preparation process of cinnamate ester
Inventors:
Usaji Takaki, Isamu Sudo, Toshio Matsuhisa
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Dec 2, 1985
Inventors
Usaji Takaki
Isamu Sudo
Toshio Matsuhisa
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.