Granted Patent
Utility
US 5,609,723 · App. 08/489,075
Oxygen bleaching process for cellulocis pulps with a polyhydric alcohol cellulose protector
Inventors:
Marco Solinas, Allan M. Proust
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Jun 9, 1995
Inventors
Marco Solinas
Allan M. Proust
Assignee (at issue)
MacMillan Bloedel Limited
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.