Granted Patent
Utility
US 3,937,680 · App. 05/364,532
Hydrophilic gel terpolymers from hydrophilic N-vinyl monomers, hydroxyalkyl acrylates or methacrylates and polymerizable unsaturated carboxylic acids
Inventor:
John Trevor de Carle
Patented Case
View Patent ↗
Granted: Feb 10, 1976
Filed: May 29, 1973
Inventor
John Trevor de Carle
Assignee (at issue)
Global Vision, Inc.
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.