US3137169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote indicating device
Assignee: Unisys Corp
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Filing: 1961-09-21
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Granted: 1964-06-16
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Expires: 1981-09-21
Abstract
No abstract record available.
Inventors
- 👤 Warren F Clement
- 👤 Joseph E Zupanick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:22
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/22; G01K11/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
141 words
A REMOTE CONDITION MEASURING APPARATUS COMPRISING A SIGNAL TRANSMITTING ELEMENT HAVING A SIGNAL MODIFICATION CHARACTERISTIC WHICH VARIES ACCORDING TO A KNOWN RELATIONSHIP WITH THE MAGNITUDE OF SAID CONDITION, A SIGNAL RECEIVING MEANS, A PAIR OF CLOSELY SPACED SUBSTANTIALLY IDENTICAL SIGNAL TRANSMISSION PATHS EACH HAVING ONE END CONNECTED TO SAID RECEIVING MEANS, THE REMAINING END OF ONE OF SAID TRANSMISSION PATHS BEING CONNECTED TO THE OUTPUT OF SAID SIGNAL TRANSMITTING ELEMENT, MEANS FOR APPLYING ACOUSTIC PULSE SIGNALS TO THE INPUT OF SAID SIGNAL TRANSMITTING ELEMENT AND TO THE REMAINING END OF THE OTHER OF SAID TRANSMISSION PATHS ACCORDING TO A KNOWN RELATIONSHIP, AN ACOUSTIC REFLECTING TERMINATION IN SAID TRANSMITTING ELEMENT TO REVERSE THE DIRECTION OF PROPAGATION OF THE ACOUSTIC PULSES THEREIN, AND MEANS ASSOCIATED WITH SAID RECEIVING MEANS FOR ASCERTAINING THE RELATIONSHIP BETWEEN THE SIGNALS RECEIVED ALONG EACH OF SAID TRANSMISSION PATHS.
References Cited (Backward Citations)
GB727891A
Cited
US2934756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |