Granted Patent
Utility
US 6,318,928 · App. 09/479,167
Method and apparatus for electrically heating a screed assembly in a paving machine
Inventor:
David Swearingen
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Jan 7, 2000
Inventor
David Swearingen
Assignee (at issue)
Astec Industries, Inc.
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.