Granted Patent
Utility
US 6,523,307 · App. 09/838,705
Balance system for sash window assembly
Inventors:
James G. Prete, Richard A. Gardner, Steven E. Schultz, Mark V. Murphy, Vincent Eslick, George E. Heid
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Apr 19, 2001
Inventors
James G. Prete
Richard A. Gardner
Steven E. Schultz
Mark V. Murphy
Vincent Eslick
George E. Heid
Assignee (at issue)
Ashland Products, 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.