Granted Patent
Utility
US 4,857,599 · App. 07/153,185
Modified dense star polymers
Inventors:
Donald A. Tomalia, James R. Stahlbush
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Feb 8, 1988
Inventors
Donald A. Tomalia
James R. Stahlbush
Assignee (at issue)
THE DOW CHEMICAL 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.