Granted Patent
Utility
US 4,478,644 · App. 06/486,163
Process and apparatus for hydrolyzing cellulose material
Inventors:
Pierre Berger, Maurice Gelus
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Apr 15, 1983
Inventors
Pierre Berger
Maurice Gelus
Assignee (at issue)
Creusot-Loire
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.