Patent US4455802A successfully refreshed from Google Patents.
US4455802A
Expired / Lapsed
US
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Wire screen fire stops
Assignee: Individual
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Filing: 1982-06-17
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Granted: 1984-06-26
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Expires: 2002-06-17
Abstract
Abstract Fire stops for structures formed of combustible materials such as frame dwellings and the like are formed of wire screen with support frames and positioned in spaced relation below wooden floor joists and wooden plates and other transverse wooden members positioned between wooden studding and the like in such structures. The wire screen introduces an element of high heat conductivity and effectively prevents the upward propagation of flame therethrough. Perforated metal sheets in contact with said wire screen support the same.
Inventors
- 👤 Joseph Charniga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:45
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
In a building structure of the wooden frame type having vertically and horizontally positioned frame members, the improvement comprising means for stopping the upward propagation of fire, said means consisting of horizontally disposed rectangular fire stops formed of perforated metal sheets and metal screen mesh, said metal screen mesh being positioned on and supported by said perforated metal sheets, flanges formed on oppositely disposed edge portions of said metal sheets, means attaching said flanges to said frame members so as to position said fire stops in said building structure in vertically spaced relation to the surfaces of said horizontally disposed wooden members thereof.
Claim 2
Dependent Claim
103 words
In a building structure of the wooden frame type having vertically and horizontally positioned frame members, the improvement comprising means for stopping the upward propagation of fire, said means consisting of horizontally disposed rectangular fire stops formed of perforated metal sheets and metal screen mesh, said metal screen mesh being positioned on and supported by said perforated metal sheets, flanges formed on oppositely disposed edge portions of said metal sheets, means attaching said flanges to said frame members so as to position said fire stops in said building structure in vertically spaced relation to the surfaces of said horizontally disposed wooden members thereof.
Claim 3
Dependent Claim
54 words
The means for stopping the propagation of a fire in a building structure set forth in claim 1 and wherein said metal screen mesh is formed of wires having a thickness from 0.010 inches to 0.020 inches and with from 18 to 22 wires per inch and the perforated metal sheets are 20 gauge.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |