Patent US2193317A successfully refreshed from Google Patents.
US3317847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic wave detector
Assignee: AT&T Inc
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Filing: 1962-05-31
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Granted: 1967-05-02
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Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 Donald L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
G; G01; G01H; G01H11/00; G01H11/06; G01H11/08; B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8926; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; H; H03; H03D; H03D1/00; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/13; H03H9/133; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A DETECTOR FOR THE MODULATION UPON A MODULATED HIGH FREQUENCY ULTRASONIC CARRIER SIGNAL COMPRISING A BODY OF PIEZOELECTRIC SEMICONDUCTIVE MATERIAL HAVING A CONDUCTIVITY THAT IS IN THE ORDER OF MAGNITUDE OF EW WHERE E IS 8.85X10**-14X THE DIELECTRIC CONSTANT OF SAID MATERIAL AND W IS THE ANGULAR FREQUENCY OF SAID HIGH FREQUENCY SIGNAL, SAID CONDUCTIVITY FALLING BETWEEN THAT FOR WHICH MAXIMUM PIEZOELECTRIC RESPONSE TO SAID HIGH FREQUENCY SIGNAL IS EXHIBITED AND THAT FOR WHICH MAXIMUM ELECTRON BUNCHING TAKES PLACE, AND A PAIR OF ELECTRODES CONTACTING SAID BODY AT LOCATIONS SPACED APART BY AN AMOUNT THAT IS LARGE COMPARED TO THE WAVELENGTH OF SAID HIGH FREQUENCY SIGNAL BUT LESS THAN THE VELOCITY OF SAID SIGNAL IN SAID BODY DIVIDED BY THE MAXIMUM NUMBER OF EXPECTED SIGNAL MAXIMA PER UNIT OF TIME.
Claim 2
Dependent Claim
130 words
A DETECTOR FOR THE MODULATION UPON A MODULATED HIGH FREQUENCY ULTRASONIC CARRIER SIGNAL COMPRISING A BODY OF PIEZOELECTRIC SEMICONDUCTIVE MATERIAL HAVING A CONDUCTIVITY THAT IS IN THE ORDER OF MAGNITUDE OF EW WHERE E IS 8.85X10**-14X THE DIELECTRIC CONSTANT OF SAID MATERIAL AND W IS THE ANGULAR FREQUENCY OF SAID HIGH FREQUENCY SIGNAL, SAID CONDUCTIVITY FALLING BETWEEN THAT FOR WHICH MAXIMUM PIEZOELECTRIC RESPONSE TO SAID HIGH FREQUENCY SIGNAL IS EXHIBITED AND THAT FOR WHICH MAXIMUM ELECTRON BUNCHING TAKES PLACE, AND A PAIR OF ELECTRODES CONTACTING SAID BODY AT LOCATIONS SPACED APART BY AN AMOUNT THAT IS LARGE COMPARED TO THE WAVELENGTH OF SAID HIGH FREQUENCY SIGNAL BUT LESS THAN THE VELOCITY OF SAID SIGNAL IN SAID BODY DIVIDED BY THE MAXIMUM NUMBER OF EXPECTED SIGNAL MAXIMA PER UNIT OF TIME.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |