Patent US3758748A successfully refreshed from Google Patents.
US3758748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for removing snow and ice from paved surfaces
Assignee: Individual
•
Filing: 1972-01-07
•
Granted: 1973-09-11
•
Expires: 1992-01-07
Abstract
Abstract A closed two pipe underground system having closed end caps and side openings is disposed below the paved surface. Heated air is circulated through the system and flows between openings to heat the surface to melt snow and ice.
Inventors
- 👤 T Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:20
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/24; E01C11/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
Apparatus for heating a paved surface to melt snow or frozen material thereon, said surface having a recess below the top thereof, pieces of material supporting said surface interspersed in said recess whereby air may circulate between said pieces, two perforated conduits extending amongst said pieces, and being laterally spaced from each other, a blower having a discharge opening communicating with one said conduit and having an intake opening communicating with the other said conduit, and heating means adjacent to and adapted to provide heat to said blower.
Claim 2
Dependent Claim
88 words
Apparatus for heating a paved surface to melt snow or frozen material thereon, said surface having a recess below the top thereof, pieces of material supporting said surface interspersed in said recess whereby air may circulate between said pieces, two perforated conduits extending amongst said pieces, and being laterally spaced from each other, a blower having a discharge opening communicating with one said conduit and having an intake opening communicating with the other said conduit, and heating means adjacent to and adapted to provide heat to said blower.
Claim 3
Dependent Claim
12 words
Apparatus as of claim 1, said pieces of material being crushed rock.
Claim 4
Dependent Claim
15 words
Apparatus as of claim 1, said conduits being circumferentially surrounded by said pieces of material.
Claim 5
Dependent Claim
12 words
Apparatus as of claim 1, said conduits being laterally opposite each other.
Claim 6
Dependent Claim
12 words
AppAratus as of claim 4, said conduits being of substantially equal length.
Claim 7
Dependent Claim
13 words
Apparatus as of claim 1, said conduits being closed at their outside ends.
Claim 8
Dependent Claim
35 words
Apparatus as of claim 1, said perforations in each of said conduits being at an inner side thereof, whereby air from one said conduit is directed towards the said perforations in the other said conduit.
Claim 9
Dependent Claim
26 words
Apparatus as of claim 5 in combination with a driveway formed of said paved surface, said conduits being located adjacent the side extremities of said driveway.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |