Granted Patent
Utility
US 5,602,190 · App. 08/374,708
Process for the production of hard polyurethane foams
Inventors:
Wilhelm Lamberts, Norbert Eisen, James A. Thompson-Colón
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Jan 27, 1995
Inventors
Wilhelm Lamberts
Norbert Eisen
James A. Thompson-Colón
Assignees (at issue)
Bayer Aktiengesellschaft
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.