Granted Patent
Utility
US 5,716,497 · App. 08/663,213
Method and device for the continuous cooking of pulp
Inventors:
Johan C. F. C. Richter, Ole J. Richter
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: Jun 12, 1996
Inventors
Johan C. F. C. Richter
Ole J. Richter
Assignee (at issue)
Kvaerner Pulping 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.