Granted Patent
Utility
US 4,957,950 · App. 07/243,324
Flame-retardant polymer compositions
Inventors:
Horst Staendeke, Daniel J. Scharf
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Sep 9, 1988
Inventors
Horst Staendeke
Daniel J. Scharf
Assignee (at issue)
Hoechst GmbH
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.