US4110945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof installation for locating water leakage points
Assignee: Dow Chemical Co
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Filing: 1976-09-07
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Granted: 1978-09-05
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Expires: 1996-09-07
Abstract
Abstract A plurality of water detectors are positioned under the water-impermeable membrane of a roof. In the event that the water-impermeable membrane is broken and the roof leaks, the general area of the leak can be determined.
Inventors
- 👤 James P. Sheahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:11
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; E; E04; E04D; E04D11/00; E04D11/02; E04D13/00; E04D13/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
In a roof structure, the roof structure comprising a roof deck, a water-impermeable membrane disposed over the roof deck, a means to maintain the water-impermeable membrane in a desired position on the roof deck, the roof having an upper surface and a lower surface, a plurality of individual spaced apart water-sensing elements disposed beneath the water-impermeable membrane and adjacent the roof deck, individual connecting means leading from said water-sensing elements whereby an instrument in connection with said sensing elements can be employed to determine if the individual sensing elements are in contact with water.
Claim 2
Dependent Claim
94 words
In a roof structure, the roof structure comprising a roof deck, a water-impermeable membrane disposed over the roof deck, a means to maintain the water-impermeable membrane in a desired position on the roof deck, the roof having an upper surface and a lower surface, a plurality of individual spaced apart water-sensing elements disposed beneath the water-impermeable membrane and adjacent the roof deck, individual connecting means leading from said water-sensing elements whereby an instrument in connection with said sensing elements can be employed to determine if the individual sensing elements are in contact with water.
Claim 3
Dependent Claim
14 words
The roof structure of claim 1 having an unserviceable roofing beneath the water-impermeable membrane.
Claim 4
Dependent Claim
25 words
The roof structure of claim 1 wherein closed-cell plastic foam is disposed over the water-impermeable membrane and a layer of gravel disposed over the foam.
Claim 5
Dependent Claim
83 words
In a method for the preparation of a roof structure wherein a water-impermeable membrane is disposed over a roof deck and the membrane held in a desired position on the roof deck, the improvement which comprises providing a plurality of individual spaced apart water-sensing elements beneath the water-permeable membrane and providing individual connecting means leading from said water-sensing elements whereby an instrument in connection with said sensing elements can be employed to determine if the individual sensing means are in contact with water.
Claim 6
Dependent Claim
83 words
In a method for the preparation of a roof structure wherein a water-impermeable membrane is disposed over a roof deck and the membrane held in a desired position on the roof deck, the improvement which comprises providing a plurality of individual spaced apart water-sensing elements beneath the water-permeable membrane and providing individual connecting means leading from said water-sensing elements whereby an instrument in connection with said sensing elements can be employed to determine if the individual sensing means are in contact with water.
References Cited (Backward Citations)
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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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |