US2868935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosensitive resistance element
Assignee: Gulton Industries Inc
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Filing: 1957-11-25
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Granted: 1959-01-13
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Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Glenn N Howatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:03
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A RESISTANCE ELEMENT COMPRISING IN COMBINATION A THIN INSULATING WAFER, CONTAINING AN OPENING OF SUBSTANTIAL SIZE, A THIN HEAT-CURED FILM FORMED A POWDERED INSULATING MATERIAL CHARACTERIZED AFTER FIRING BY A HIGH TEMPERATURE COEFFICIENT OF RESISTANCE, SUSPENDED IN A THERMOPLASTIC BINDER, SAID FILM COVERING SAID OPENING AND THERMALLY BONDED TO AT LEAST A PORTION OF ONE SURFACE OF SAID WAFER, AND ELECTRODES COUPLED TO OPPOSITE SURFACES OF SAID FILM.
Claim 2
Dependent Claim
68 words
A RESISTANCE ELEMENT COMPRISING IN COMBINATION A THIN INSULATING WAFER, CONTAINING AN OPENING OF SUBSTANTIAL SIZE, A THIN HEAT-CURED FILM FORMED A POWDERED INSULATING MATERIAL CHARACTERIZED AFTER FIRING BY A HIGH TEMPERATURE COEFFICIENT OF RESISTANCE, SUSPENDED IN A THERMOPLASTIC BINDER, SAID FILM COVERING SAID OPENING AND THERMALLY BONDED TO AT LEAST A PORTION OF ONE SURFACE OF SAID WAFER, AND ELECTRODES COUPLED TO OPPOSITE SURFACES OF SAID FILM.
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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |