Granted Patent
Utility
US 5,300,195 · App. 07/200,204
Continuous vertical digester apparatus
Inventors:
Johan C. F. C. Richter, Ole J. Richter
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: May 31, 1988
Inventors
Johan C. F. C. Richter
Ole J. Richter
Assignee (at issue)
Kamyr AB
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.