Patent US3784783A successfully refreshed from Google Patents.
US3784783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
De-icing structure for roofs
Assignee: Individual
•
Filing: 1973-03-26
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Granted: 1974-01-08
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Expires: 1993-03-26
Abstract
Abstract A device and method for melting ice and snow on a roof structure; the device comprises upper and lower portions with heating means, for example, a heating cable supported on said lower portion; the device is supported on a sloping portion of a roof and the melted and melting ice and snow flows downwardly under gravity.
Inventors
- 👤 G Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:16
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/10; E04D13/103; H; H05; H05B; H05B3/00; H05B2214/00; H05B2214/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A device for melting ice and snow on a roof structure comprising upper and lower portions, said upper portion being spaced apart from and supported on said lower portion, heating means between said upper and lower portions and means for supporting the device on a sloping portion of a roof structure, wherein said bottom portion has an opening defined in a central part thereof and said means comprises a tubular downwardly extending spigot adapted to fit in a drain means.
Claim 2
Independent Claim
80 words
A device for melting ice and snow on a roof structure comprising upper and lower portions, said upper portion being spaced apart from and supported on said lower portion, heating means between said upper and lower portions and means for supporting the device on a sloping portion of a roof structure, wherein said bottom portion has an opening defined in a central part thereof and said means comprises a tubular downwardly extending spigot adapted to fit in a drain means.
Claim 3
Independent Claim
88 words
A device for melting ice and snow on a roof structure comprising upper and lower portions, said upper portion being spaced apart from and supported on said lower portion, heating means between said upper and lower portions and means for supporting the device on a sloping portion of a roof structure, said upper and lower portions being spaced apart by side wall members to define a narrow passage between the upper and lower portions for melted and melting ice and snow and air convection currents to pass through.
Claim 4
Independent Claim
88 words
A device for melting ice and snow on a roof structure comprising upper and lower portions, said upper portion being spaced apart from and supported on said lower portion, heating means between said upper and lower portions and means for supporting the device on a sloping portion of a roof structure, said upper and lower portions being spaced apart by side wall members to define a narrow passage between the upper and lower portions for melted and melting ice and snow and air convection currents to pass through.
Claim 5
Dependent Claim
20 words
A device according to claim 2 wherein said heating means comprises an electrical heating cable mounted on said lower portion.
Claim 6
Dependent Claim
21 words
A device according to claim 3 wherein said cable is trained for part of its length in a series of loops.
Claim 7
Dependent Claim
37 words
A device according to claim 3 wherein the bottom portion is curved over along one edge to form a hook defining a recess, said heating cable being contained in said recess along a part of its length.
Claim 8
Dependent Claim
23 words
A device according to claim 2 including spaced apart support members intermediate said side walls to provide additional support for said top portion.
Claim 9
Dependent Claim
16 words
A device according to claim 2 wherein said lower and upper portions are of aluminum sheeting.
Claim 10
Dependent Claim
16 words
In combination with a roof a device for melting ice and snow according to claim 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |