Granted Patent
Utility
US 4,098,645 · App. 05/743,035
Immobilization of proteins with polyurethane polymers
Inventors:
Frank J. Hartdegen, Wayne E. Swann
Patented Case
View Patent ↗
Granted: Jul 4, 1978
Filed: Nov 18, 1976
Inventors
Frank J. Hartdegen
Wayne E. Swann
Assignee (at issue)
W. R. Grace & Co.
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.