Granted Patent
Utility
US 4,451,628 · App. 06/417,249
Process for preparing low molecular weight water-soluble polymers by copolymerizing with water-soluble monomers a calculated quantity of methallylsulfonate monomer
Inventor:
Laurence G. Dammann
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Sep 13, 1982
Inventor
Laurence G. Dammann
Assignee (at issue)
Celanese GmbH
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.