Patent US5830773A successfully refreshed from Google Patents.
Patent US3305668A successfully refreshed from Google Patents.
US3305668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable heater
Assignee: Individual
•
Filing: 1964-08-27
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Granted: 1967-02-21
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Expires: 1984-08-27
Abstract
No abstract record available.
Inventors
- 👤 David C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:15
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/20; H05B3/34; H05B3/342; H05B3/565; H05B2203/00; H05B2203/017; H05B2203/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A HEATING CABLE DEVICE ADAPTED FOR USE IN INACCESSIBLE LOCATIONS IN WHICH IT IS DIFFICULT TO DETERMINE WHETHER THE DEVICE IS OPERATING, SAID DEVICE COMPRISING: A RELATIVELY THIN, FLEXIBLE HEATING CABLE INCLUDING AN ELECTRICALLY CONDUCTIVE RESISTANCE HEATING ELEMENT EMBEDDED IN A FLEXIBLE INSULATOR COVERING; A THERMOSTAT, ELECTRICALLY CONNECTED AND ADJACENT TO SAID HEATING ELEMENT, FOR CONTROLLING ENERGIZATION OF SAID HEATING ELEMENT; INDICATOR MEANS, COMPRISING AN INDICATOR LAMP ELECTRICALLY CONNECTED TO SAID THERMOSTAT AND TO SAID HEATING ELEMENT AND ENERGIZED ONLY UPON CLOSING OF SAID THERMOSTAT, FOR INDICATING ENERGIZATION OF SAID HEATING ELEMENT; SAID INDICATOR MEANS FURTHER COMPRISING A SUBSTANTIALLY TRANSLUCENT INSULATOR ENVELOPE ENCOMPASSING SAID INDICATOR LAMP, SAID ENVELOPE BEING DISPOSED WITHIN AN OPENING IN SAID INSULATOR COVERING OF SAID HEATING CABLE AND BEING OF A SIZE PRECLUDING A SUBSTANTIAL INCREASE IN THE OVERALL DIMENSIONS OF SAID CABLE.
Claim 2
Dependent Claim
137 words
A HEATING CABLE DEVICE ADAPTED FOR USE IN INACCESSIBLE LOCATIONS IN WHICH IT IS DIFFICULT TO DETERMINE WHETHER THE DEVICE IS OPERATING, SAID DEVICE COMPRISING: A RELATIVELY THIN, FLEXIBLE HEATING CABLE INCLUDING AN ELECTRICALLY CONDUCTIVE RESISTANCE HEATING ELEMENT EMBEDDED IN A FLEXIBLE INSULATOR COVERING; A THERMOSTAT, ELECTRICALLY CONNECTED AND ADJACENT TO SAID HEATING ELEMENT, FOR CONTROLLING ENERGIZATION OF SAID HEATING ELEMENT; INDICATOR MEANS, COMPRISING AN INDICATOR LAMP ELECTRICALLY CONNECTED TO SAID THERMOSTAT AND TO SAID HEATING ELEMENT AND ENERGIZED ONLY UPON CLOSING OF SAID THERMOSTAT, FOR INDICATING ENERGIZATION OF SAID HEATING ELEMENT; SAID INDICATOR MEANS FURTHER COMPRISING A SUBSTANTIALLY TRANSLUCENT INSULATOR ENVELOPE ENCOMPASSING SAID INDICATOR LAMP, SAID ENVELOPE BEING DISPOSED WITHIN AN OPENING IN SAID INSULATOR COVERING OF SAID HEATING CABLE AND BEING OF A SIZE PRECLUDING A SUBSTANTIAL INCREASE IN THE OVERALL DIMENSIONS OF SAID CABLE.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |