Granted Patent
Utility
US 4,352,916 · App. 06/284,271
Use of hydrophobically modified water soluble polymers in suspension polymerization
Inventor:
Leo M. Landoll
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Jul 17, 1981
Inventor
Leo M. Landoll
Assignee (at issue)
HERCULES LLC
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.