US3257530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensing cable
Assignee: Individual
•
Filing: 1963-11-01
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Granted: 1966-06-21
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Expires: 1983-11-01
Abstract
No abstract record available.
Inventors
- 👤 John S Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:14
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/02; A62C3/0214; A62C3/0292; G; G08; G08B; G08B17/00; G08B17/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
AN ELECTRICAL CONTROL SYSTEM INCLUDING: AN ELONGATED HEAT-SENSING ELEMENT COMPRISING A PAIR OF TWISTED ELECTIC WIRES AND A FLAT WEB OF TEMPERATURE-SENSITIVE MATERIAL NORMALLY HOLDING SAID TWISTED WIRES SEPARATED AND SPACED FROM ONE ANOTHER A DISTANCE GREATER THAN THE DIAMETER OF THE INDIVIDUAL WIRES; AND MEANS MOUNTING SAID ELONGATED HEAT-SENSING ELEMENT UNDER TENSION TO CAUSE SAID ELECTRIC WIRES TO CONTACT ONE ANOTHER ELECTRICALLY UPON THE REACTION OF SAID TEMPERATURE-SENSITIVE MATERIAL TO TEMPERATURES ABOVE A PARTICULAR THRESHOLD.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |