Granted Patent
Utility
US 6,476,111 · App. 09/919,712
Extrudable highly filled thermoplastic sheet composition
Inventors:
Paul Beauchemin, Barry J. Heitner, Clyde Spencer Hutchins, Keith William Pollak, Jennifer Leigh Thompson
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Aug 1, 2001
Inventors
Paul Beauchemin
Barry J. Heitner
Clyde Spencer Hutchins
Keith William Pollak
Jennifer Leigh Thompson
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.