Granted Patent
Utility
US 6,784,146 · App. 09/699,303
Deinking method and composition for wastepaper
Inventors:
Jing Luo, David D. Dreisbach, Michael Lease Hemenway
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Oct 27, 2000
Inventors
Jing Luo
David D. Dreisbach
Michael Lease Hemenway
Assignee (at issue)
KEMIRA CHEMICALS, 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.