US3290934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic fluid metering device
Assignee: Lockheed Martin Corp
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Filing: 1962-09-27
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Granted: 1966-12-13
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Alvin E Brown
- 👤 Fred J Suellentrop
- 👤 Rule Eric
- 👤 Donald J Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:56
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A FLUID METERING DEVICE COMPRISING A FIRST SUPERSONIC TRANSMITTER AND A FIRST RECEIVER LOCATED IN ACOUSTIC CONTACT WITH A FLUID STREAM THAT SIGNALS ARE TRANSMITTED THROUGH SUCH STREAM FROM SAID TRANSMITTER TO SAID RECEIVER IN A DIRECTION GENERALLY UPSTREAM OF SAID FLUID FLOW, A FIRST FEEDBACK PATH COUPLING THE OUTPUT OF SAID RECEIVER TO THE INPUT OF SAID TRANSMITTER, A SECOND SUPERSONIC TRANSMITTER AND A SECOND RECEIVER LOCATED AT SUCH SPACED POINTS IN SAID FLUID STREAM THAT SIGNALS ARE TRANSMITTED THROUGH SAID STREAM TO SAID SECOND RECEIVER IN A DIRECTION GENERALLY DOWNSTREAM OF SAID FLUID FLOW, A SECOND FEEDBACK PATH COUPLING THE OUTPUT OF SAID SECOND RECEIVER TO THE INPUT OF SAID SECOND TRANSMITTER, MEANS IN SAID FIRST FEEDBACK PATH FOR DERIVING AN OUTPUT SIGNAL THEREFROM, MEANS IN SAID SECOND FEEDBACK PATH FOR DERIVING A SIGNAL THEREFROM, THE IMPROVEMENT BEING A FIRST HARMONIC GENERATING MEANS OPERATIVELY CONNECTED TO SAID FIRST FEEDBACK PATH, A SECOND HARMONIC GENERATING MEANS OPERATIVELY CONNECTED TO SAID SECOND FEEDBACK PATH, A FIRST
Claim 2
Dependent Claim
167 words
IN A FLUID METERING DEVICE COMPRISING A FIRST SUPERSONIC TRANSMITTER AND A FIRST RECEIVER LOCATED IN ACOUSTIC CONTACT WITH A FLUID STREAM THAT SIGNALS ARE TRANSMITTED THROUGH SUCH STREAM FROM SAID TRANSMITTER TO SAID RECEIVER IN A DIRECTION GENERALLY UPSTREAM OF SAID FLUID FLOW, A FIRST FEEDBACK PATH COUPLING THE OUTPUT OF SAID RECEIVER TO THE INPUT OF SAID TRANSMITTER, A SECOND SUPERSONIC TRANSMITTER AND A SECOND RECEIVER LOCATED AT SUCH SPACED POINTS IN SAID FLUID STREAM THAT SIGNALS ARE TRANSMITTED THROUGH SAID STREAM TO SAID SECOND RECEIVER IN A DIRECTION GENERALLY DOWNSTREAM OF SAID FLUID FLOW, A SECOND FEEDBACK PATH COUPLING THE OUTPUT OF SAID SECOND RECEIVER TO THE INPUT OF SAID SECOND TRANSMITTER, MEANS IN SAID FIRST FEEDBACK PATH FOR DERIVING AN OUTPUT SIGNAL THEREFROM, MEANS IN SAID SECOND FEEDBACK PATH FOR DERIVING A SIGNAL THEREFROM, THE IMPROVEMENT BEING A FIRST HARMONIC GENERATING MEANS OPERATIVELY CONNECTED TO SAID FIRST FEEDBACK PATH, A SECOND HARMONIC GENERATING MEANS OPERATIVELY CONNECTED TO SAID SECOND FEEDBACK PATH, A FIRST
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |