Granted Patent
Utility
US 4,883,850 · App. 07/197,713
Process for preparation of polymers by suspension polymerization of vinyl monomer in the presence of hydrophobically modified watersoluble, nonionic cellulose ether polymer in combination with electrolyte
Inventor:
Daniel H. Craig
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: May 23, 1988
Inventor
Daniel H. Craig
Assignee (at issue)
Aqualon Company
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.