Granted Patent
Utility
US 6,668,457 · App. 09/459,756
Heat-activated structural foam reinforced hydroform
Inventor:
Michael Czaplicki
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Dec 10, 1999
Inventor
Michael Czaplicki
Assignee (at issue)
L&L 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.