Granted Patent
Utility
US 4,898,913 · App. 07/334,501
Method of making hydrophobic copolymers hydrophilic
Inventors:
Maris J. Ziemelis, William R. R. Park
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Apr 7, 1989
Inventors
Maris J. Ziemelis
William R. R. Park
Assignee (at issue)
Dow Corning Corporation
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.