Patent US3089339A successfully refreshed from Google Patents.
US3089339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature sensitive devices
Assignee: Graviner Manufacturing Co Ltd
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Filing: 1960-04-25
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Granted: 1963-05-14
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Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 Edward A Rogers
- 👤 Bennett Neill Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:39
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/06; G01; G01K; G01K11/00; G01K11/06; G01K3/00; G01K3/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A TEMPERATURE DETECTOR COMPRISING TWO ELONGATED ELECTRICAL CONDUCTORS, SAID CONDUCTORS BEING SPACED APART, AND A MASS EXTENDING BETWEEN SAID CONDUCTORS, SAID MASS BEING COMPOSED OF GLASS WITH MEMBERS OF REFRACTORY MATERIAL DISTRIBUTED ALONG THE LENGTH OF THE DETECTOR, SAID GLASS HAVING AN ELECTRICAL RESISTANCE WHICH IS HIGH AT LOW TEMPERATURES BUT WHICH FALLS GRADUALLY WITH INCREASING TEMPERATURE, SAID REFRACTORY MEMBERS BEING COATED WITH A FUSIBLE CHEMICAL SALT WHICH WHEN FUSED EXHIBITS A HIGH ELECTRICAL CONDUCTIVITY.
References Cited (Backward Citations)
US2413125A
Cited
US2677172A
Cited
US2740874A
Cited
US2836692A
Cited
US2949594A
Cited
US2893182A
Cited
US3009127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |