Granted Patent
Utility
US 6,653,432 · App. 10/168,020
Condensation polymerization method for isocyanates
Inventors:
Frédéric Dallemer, Jean-Marie Bernard, Denis Revelant, Frederic Leising
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Jun 18, 2002
Inventors
Frédéric Dallemer
Jean-Marie Bernard
Denis Revelant
Frederic Leising
Assignee (at issue)
RHODIA CHIMIE
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.