Granted Patent
Utility
US 5,236,553 · App. 07/772,138
Continuous cooking with reduced horsepower and pulp degradation
Inventor:
Johan C. F. C. Richter
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Oct 9, 1991
Inventor
Johan C. F. C. 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.