Patent US3344669A successfully refreshed from Google Patents.
US3344669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for sensing thermal gradients
Assignee: Individual
•
Filing: 1963-08-23
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Granted: 1967-10-03
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Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin W Roedder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:52
CPC Classifications
G; G01; G01K; G01K1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
AN INSTRUMENT FOR INDICATING AND MEASURING THERMAL GRADIENTS COMPRISING A SEALED TUBULAR ENCLOSURE OF THIN TRANSPARENT MATERIAL CONTAINING A LIQUID AND A POCKET OF GAS AT LEAST PARTIALLY CONFINED BY SAID LIQUID, SAID ENCLOSURE HAVING AN ARCHED CENTRAL SECTION EACH END OF WHICH COVERGES SMOOTHLY WITH A SEPARATE UPWARDLY AND OUTWARDLY EXTENDING STRAIGHT SECTION RELATIVELY SHORTER THAN SAID CENTRAL SECTION.
References Cited (Backward Citations)
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US1811024A
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US2074692A
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US2206033A
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US2936411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |