Granted Patent
Utility
US 4,404,063 · App. 06/423,094
Method for the separation of indole
Inventor:
Tadatoshi Honda
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Sep 24, 1982
Inventor
Tadatoshi Honda
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.