Granted Patent
Utility
US 6,743,332 · App. 09/860,025
High temperature peroxide bleaching of mechanical pulps
Inventors:
Kaaren Haynes, Roger O. Campbell, Zeecha L. Brooks, Anthony Parrish, Robert T. Hamilton
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: May 16, 2001
Inventors
Kaaren Haynes
Roger O. Campbell
Zeecha L. Brooks
Anthony Parrish
Robert T. Hamilton
Assignee (at issue)
Weyerhaeuser NR Company
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.