Granted Patent
Utility
US 4,952,519 · App. 07/188,956
Protein immobilization with poly(ethyleneimine) derivatized with a hydroprobic group
Inventor:
Phillip H. Lau
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: May 2, 1988
Inventor
Phillip H. Lau
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.