Granted Patent
Utility
US 4,259,149 · App. 06/079,274
Method of reducing waste stream pollutants by the control and separation of waste contaminants from a multi-stage cellulosic bleaching sequence
Inventors:
Daniel J. Jaszka, Ralph J. Gall, Garry R. Roseman
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Sep 27, 1979
Inventors
Daniel J. Jaszka
Ralph J. Gall
Garry R. Roseman
Assignee (at issue)
Hooker Chemicals & Plastics Corporation
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.