Granted Patent
Utility
US 5,665,573 · App. 08/347,358
Polymerization of lignin at alkaline pH
Inventor:
Birgitte Yde
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Dec 1, 1994
Inventor
Birgitte Yde
Assignee (at issue)
Novo Nordisk 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.