Granted Patent
Utility
US 5,175,308 · App. 07/609,641
Preparation process of indoles
Inventors:
Tadatoshi Honda, Makoto Kotani
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Nov 6, 1990
Inventors
Tadatoshi Honda
Makoto Kotani
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.