Granted Patent
Utility
US 5,665,284 · App. 08/427,892
Process for manufacturing foam-filled extruded products
Inventors:
Ronald D. Erwin, Marvin Ray Whitley
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Apr 26, 1995
Inventors
Ronald D. Erwin
Marvin Ray Whitley
Assignee (at issue)
Ronald D. Erwin
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.