Patent US3146977A successfully refreshed from Google Patents.
US3146977A
Expired / Lapsed
US
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Electric heaters for railway permanent way systems
Assignee: Geo Bray and Co Ltd
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Filing: 1962-10-08
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Granted: 1964-09-01
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Expires: 1982-10-08
Abstract
No abstract record available.
Inventors
- 👤 Coates Arthur
- 👤 Gordon B Russell
- 👤 Birchenhough Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:41
CPC Classifications
E; E01; E01B; E01B7/00; E01B7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN ELECTRIC HEATING ASSEMBLY CONSTRUCTED FOR ATTACHMENT TO THE SLIDE CHAIR OF A RAILWAY PERMANENT WAY IN SITU, SAID HEATING ASSEMBLY COMPRISING A HEATING ELEMENT OF THE SHEATHED WIRE TUBULAR TYPE AND OF HAIRPIN FORM, CLAMPING MEANS FOR CLAMPING SAID HEATING ELEMENT IN HEAT CONDUCTIVE RELATION WITH SAID SLIDE CHAIR AND A FIXED TRACK RAIL ON SAID SLIDE CHAIR, THE ASSEMBLY FURTHER COMPRISING A WATERTIGHT TERMINAL BOX FOR THE EXTREMITY OF EACH LIMB OF SAID HEATING ELEMENT, SAID CLAMPING MEANS CONSISTING OF A PAIR OF CLAMP MEMBERS DISPOSED ONE ON EACH LIMB OF SAID HEATING ELEMENT AND ENGAGING SAID FIXED TRACK RAIL, EACH OF SAID CLAMP MEMBERS BEING IN THE FORM
Claim 2
Dependent Claim
111 words
AN ELECTRIC HEATING ASSEMBLY CONSTRUCTED FOR ATTACHMENT TO THE SLIDE CHAIR OF A RAILWAY PERMANENT WAY IN SITU, SAID HEATING ASSEMBLY COMPRISING A HEATING ELEMENT OF THE SHEATHED WIRE TUBULAR TYPE AND OF HAIRPIN FORM, CLAMPING MEANS FOR CLAMPING SAID HEATING ELEMENT IN HEAT CONDUCTIVE RELATION WITH SAID SLIDE CHAIR AND A FIXED TRACK RAIL ON SAID SLIDE CHAIR, THE ASSEMBLY FURTHER COMPRISING A WATERTIGHT TERMINAL BOX FOR THE EXTREMITY OF EACH LIMB OF SAID HEATING ELEMENT, SAID CLAMPING MEANS CONSISTING OF A PAIR OF CLAMP MEMBERS DISPOSED ONE ON EACH LIMB OF SAID HEATING ELEMENT AND ENGAGING SAID FIXED TRACK RAIL, EACH OF SAID CLAMP MEMBERS BEING IN THE FORM
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |