Granted Patent
Utility
US 5,462,641 · App. 08/086,803
Process for bleaching pulp with adsorption of metals
Inventors:
Anders Bergvist, Hakan Dahllof
Patented Case
View Patent ↗
Granted: Oct 31, 1995
Filed: Jul 7, 1993
Inventors
Anders Bergvist
Hakan Dahllof
Assignee (at issue)
Kamyr, Inc.
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.