US2789281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ice detector
Assignee: Clevite Corp
•
Filing: 1954-03-15
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Granted: 1957-04-16
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Expires: 1974-03-15
Abstract
No abstract record available.
Inventors
- 👤 William P Short
- 👤 Philip D Goodman
- 👤 Oskar E Mattiat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:07
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AN ICE DETECTOR COMPRISING AN OSCILLATOR HAVING A FEEDBACK CIRCUIT, A PIEZOELECTRI TRANSDUCER CONTAINING POLARIZED CERAMIC BATIUM TITANATE CONNECTED IN SAID FEEDBACK CIRCUIT AND HAVING A NATURAL RESONANT FREQUENCY WHICH DETERMINES THE FREQUENCY AT WHICH THE OSCILLATOR OPERATES, SAID TRANSDUCERS BEING EXPOSED TO THE FORMATION AND ACCRETION OF ICE THEREON AND CONTROLLING THE AMPLITUDE
Claim 2
Dependent Claim
54 words
AN ICE DETECTOR COMPRISING AN OSCILLATOR HAVING A FEEDBACK CIRCUIT, A PIEZOELECTRI TRANSDUCER CONTAINING POLARIZED CERAMIC BATIUM TITANATE CONNECTED IN SAID FEEDBACK CIRCUIT AND HAVING A NATURAL RESONANT FREQUENCY WHICH DETERMINES THE FREQUENCY AT WHICH THE OSCILLATOR OPERATES, SAID TRANSDUCERS BEING EXPOSED TO THE FORMATION AND ACCRETION OF ICE THEREON AND CONTROLLING THE AMPLITUDE
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |