Granted Patent
Utility
US 4,505,849 · App. 06/469,466
Polyol pre-mixture for making flame-retardant poly-urethane foam plastics
Inventors:
Horst Staendeke, Franz-Josef Dany, Joachim Kandler
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Feb 24, 1983
Inventors
Horst Staendeke
Franz-Josef Dany
Joachim Kandler
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.