Granted Patent
Utility
US 4,355,171 · App. 06/165,571
Preparation of polysiloxane/polyoxyalkylene copolymer useful as stabilizers in making polyurethane foams
Inventors:
Armand de Montigny, Hans-Walter Illger, Alberto C. Gonzalez-Doerner, Hans-Heinrich Moretto
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Jul 2, 1980
Inventors
Armand de Montigny
Hans-Walter Illger
Alberto C. Gonzalez-Doerner
Hans-Heinrich Moretto
Assignee (at issue)
Bayer Aktiengesellschaft
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.