Granted Patent
Utility
US 6,231,621 · App. 09/271,540
Diaminobenzoic acid derivatives as dye precursors
Inventors:
Niels Henrik S.o slashed.rensen, Ole Kirk, Rikke Lolck, Torben Desler
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Mar 18, 1999
Inventors
Niels Henrik S.o slashed.rensen
Ole Kirk
Rikke Lolck
Torben Desler
Assignee (at issue)
Novozymes A/S
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.