US4035967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Raised floor panels
Assignee: A R I PROPAFLOR Ltd
•
Filing: 1973-12-19
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Granted: 1977-07-19
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Expires: 1993-12-19
Abstract
Abstract The invention relates to raised flooring panels which have excellent fire resistance. The panels of the invention comprise wooden panels whose undersides and side edges are covered with a metal sheet, and the panels being strengthened by downwardly projecting metal flanges. Such a panel can have better fire resisting properties than a metal panel which is liable to warp when there is a fire and which conducts heat to its upper surface so that floor coverings rapidly reach their flash point or than a wooden panel whose underside but not side edges are covered with a metal sheet.
Inventors
- 👤 Ronald William Stanley Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:47
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/02; E04F15/024; E04F15/02405; E04F15/02435; E04F15/02417; E04F15/02423
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
A flooring panel for a raised flooring comprising: a rectangular wooden panel having an upperface, an underface and side edges, a fire-resisting metal pan adhered to and covering said underface and side edges of said wooden panel, said metal pan comprising a shaped metal sheet having a flat rectangular shaped section for covering and contacting substantially all of said underface of said wooden panel, four leafs extending from said edges of said rectangular shaped section, each of said leaves comprising a first sub-section adjacent said rectangular shaped section bent downwardly at right angles from said rectangular shaped section and a second sub-section folded back on said first sub-section to form firstly with said first sub-section a downwardly projecting metal flange and secondly extending upwardly past said first sub-section by substantially the thickness of such wooden panel to form a metal cover for said side edges of said wooden panel.
Claim 2
Dependent Claim
149 words
A flooring panel for a raised flooring comprising: a rectangular wooden panel having an upperface, an underface and side edges, a fire-resisting metal pan adhered to and covering said underface and side edges of said wooden panel, said metal pan comprising a shaped metal sheet having a flat rectangular shaped section for covering and contacting substantially all of said underface of said wooden panel, four leafs extending from said edges of said rectangular shaped section, each of said leaves comprising a first sub-section adjacent said rectangular shaped section bent downwardly at right angles from said rectangular shaped section and a second sub-section folded back on said first sub-section to form firstly with said first sub-section a downwardly projecting metal flange and secondly extending upwardly past said first sub-section by substantially the thickness of such wooden panel to form a metal cover for said side edges of said wooden panel.
Claim 3
Dependent Claim
43 words
A flooring panel according to claim 1 further comprising an edging strip provided around said side edges of said wooden panel adjacent its upper face to form a seal to fill any crevices between adjacent panels when assembled to form a raised floor.
Claim 4
Dependent Claim
26 words
A flooring panel according to claim 1 in which said wooden panel is square and said flat rectangular shaped section of said metal pan is square.
Claim 5
Dependent Claim
24 words
A raised flooring composed of flooring panels according to claim 1, and flooring props for engaging said metal flanges to support said flooring panels.
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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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |