Granted Patent
Utility
US 4,529,523 · App. 06/386,472
Hydrophobically modified polymers
Inventor:
Leo M. Landoll
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Jun 8, 1982
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.