Granted Patent
Utility
US 4,642,267 · App. 06/731,111
Hydrophilic polymer blend
Inventors:
Walter S. Creasy, Donald H. Lorenz, Robert G. LaCasse, Salvatore A. Malagreca
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: May 6, 1985
Inventors
Walter S. Creasy
Donald H. Lorenz
Robert G. LaCasse
Salvatore A. Malagreca
Assignee (at issue)
HYDROMER, 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.