US Patent 6928777 Method and apparatus for firestopping a through-penetration
Patent 6928777 was granted and assigned to 3M on August, 2005 by the United States Patent and Trademark Office.
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Patent 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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Patent Inventor Names
Brandon L. Cordts0
Date of Patent
August 16, 2005
0Patent Application Number
102955020
Date Filed
November 15, 2002
0Patent Primary Examiner
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US Patent 6928777 Method and apparatus for firestopping a through-penetration
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