Granted Patent
Utility
US 4,687,786 · App. 06/833,957
Process for the preparation of flexible polyurethane foams
Inventors:
Hans-Joachim Kollmeier, Rolf-Dieter Langenhagen
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Feb 27, 1986
Inventors
Hans-Joachim Kollmeier
Rolf-Dieter Langenhagen
Assignee (at issue)
Th. Goldschmidt. AG
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.