Granted Patent
Utility
US 6,228,296 · App. 09/274,055
Rolled rigid foam
Inventors:
Kenneth Ray Cartmill, Gregory W. Lynn
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Mar 22, 1999
Inventors
Kenneth Ray Cartmill
Gregory W. Lynn
Assignee (at issue)
Celotex Corporation
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.