Granted Patent
Utility
US 4,424,284 · App. 06/313,061
Cationic adsorption agent
Inventors:
Jaroslav Haase, Roger Palmberg
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Oct 19, 1981
Inventors
Jaroslav Haase
Roger Palmberg
Assignee (at issue)
Ciga-Geigy 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.