Granted Patent
Utility
US 5,387,617 · App. 08/148,440
Small cell foams and blends and a process for their preparation
Inventors:
David M. Hedstrand, Donald A. Tomalia
Patented Case
View Patent ↗
Granted: Feb 7, 1995
Filed: Nov 8, 1993
Inventors
David M. Hedstrand
Donald A. Tomalia
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.