Granted Patent
Utility
US 5,093,376 · App. 07/554,696
Method for the preparation of flexible polyester polyurethane foams
Inventors:
Volker Mohring, Volker Zellmer, Georg Burkhart, Jurgen Fock, Hans-Heinrich Schlons
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Jul 18, 1990
Inventors
Volker Mohring
Volker Zellmer
Georg Burkhart
Jurgen Fock
Hans-Heinrich Schlons
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.