The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1992
Filed:
Jan. 14, 1991
Applicant:
Inventors:
Eric B Robertson, Bradenton, FL (US);
John C Ibasfalean, Cortez, FL (US);
Assignee:
National Improvement Company, Inc., Cortez, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E04H / ;
U.S. Cl.
CPC ...
52232 ; 52317 ; 52221 ;
Abstract
A fire safety device for closing through-holes in floors and walls and for thus stopping the potential spread of fire and smoke in case of the occurrence of a fire, includes a section of pipe having a weakened wall, a cup-shaped retainer spaced from the outside surface of the pipe section so as to define an annular space therebetween, the annular space in turn being provided with a suitable and pre-measured quantity of intumescent material. The device is pre-fabricated and thus avoids the problems inherent in attempting to manually provide the intumescent material in a collar during construction.