Granted Patent
Utility
US 4,734,439 · App. 06/926,770
Foam-containing polyurethane(urea) compositions and process for the preparation thereof
Inventor:
Artur Reischl
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Nov 4, 1986
Inventor
Artur Reischl
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.