Granted Patent
Utility
US 6,387,985 · App. 09/737,438
Acrylic based formulation for improved temperature and impact performance employing crushed natural stone
Inventors:
Steven P. Wilkinson, Larry L. Burchfield
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Dec 14, 2000
Inventors
Steven P. Wilkinson
Larry L. Burchfield
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.