Granted Patent
Utility
US 6,572,158 · App. 10/074,542
Apparatus for securing sash window
Inventors:
Matthew Peter Szapucki, Richard Kulkaski
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Feb 12, 2002
Inventors
Matthew Peter Szapucki
Richard Kulkaski
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.