Static structures (e.g. – buildings) – Wall – ceiling – or floor designed for utilities – Having a passageway through the entire wall – ceiling – or...
Reexamination Certificate
2005-08-16
2005-08-16
Nelson, Jr., Milton (Department: 3636)
Static structures (e.g., buildings)
Wall, ceiling, or floor designed for utilities
Having a passageway through the entire wall, ceiling, or...
C052S317000
Reexamination Certificate
active
06928777
ABSTRACT:
An apparatus for creating a firestopping barrier in a through-penetration includes a support mechanism arranged within the through-penetration, firestop material movably connected with the support mechanism, and firestop material arranged between the firestop material movably connected with the support mechanism and the inner surface of the through penetration.
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3M Innovative Properties Company
Jr. Milton Nelson
Patchett David B.
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