Granted Patent
Utility
US 5,478,866 · App. 08/426,009
Flexible polyurethane foam and process for preparing same
Inventors:
Masashi Obata, Seijiro Sakai, Kaoru Ueno
Patented Case
View Patent ↗
Granted: Dec 26, 1995
Filed: Apr 20, 1995
Inventors
Masashi Obata
Seijiro Sakai
Kaoru Ueno
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.