Granted Patent
Utility
US 4,409,416 · App. 06/353,314
Lignin cracking process using fast fluidized bed reactions
Inventors:
George J. Snell, Derk T. A. Huibers
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Mar 1, 1982
Inventors
George J. Snell
Derk T. A. Huibers
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.