US3209350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification interrogation system
Assignee: General Electric Co
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Filing: 1963-10-04
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Granted: 1965-09-28
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Richard K Davis
- 👤 Rouald E Gareis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN AN IDENTIFICATION INTERROGATION SYSTEM HAVING A SIGNAL REPEATING DEVICE ASSOCIATED WITH EACH OBJECT TO BE IDENTIFIED, EACH SIGNAL REPEATING DEVICE HAVING A PLURALITY OF SELECTED PIEZOELECTRIC ELEMENTS, EACH PIEZOELECTRIC ELEMENT OF A DIFFERENT PRESELECTED FREQUENCY RESPONSE MEANS FOR TRANSMITTING A VARIABLE FREQUENCY SIGNAL COVERING THE FREQUENCY RANGE OF SAID SIGNAL REPEATING DEVICE, A FIRST ANTENNA FOR RECEIVING THE SIGNALS REFLECTED FROM SAID SIGNAL REPEATING DEVICES, A SECOND ANTENNA SHORTER THAN SAID FIRST ANTENNA AND ENTIRELY WITHIN THE FIELD OF SAID FIRST ANTENNA FOR RECEIVING THE SIGNALS REFLECTED FROM SAID SIGNAL REPEATING DEVICES, AND MEANS RESPONSIVE TO THE SIGNALS RECEIVED BY SAID SECOND ANTENNA FOR GATING THE SIGNALS RECEIVED BY SAID FIRST ANTENNA.
Claim 2
Dependent Claim
113 words
IN AN IDENTIFICATION INTERROGATION SYSTEM HAVING A SIGNAL REPEATING DEVICE ASSOCIATED WITH EACH OBJECT TO BE IDENTIFIED, EACH SIGNAL REPEATING DEVICE HAVING A PLURALITY OF SELECTED PIEZOELECTRIC ELEMENTS, EACH PIEZOELECTRIC ELEMENT OF A DIFFERENT PRESELECTED FREQUENCY RESPONSE MEANS FOR TRANSMITTING A VARIABLE FREQUENCY SIGNAL COVERING THE FREQUENCY RANGE OF SAID SIGNAL REPEATING DEVICE, A FIRST ANTENNA FOR RECEIVING THE SIGNALS REFLECTED FROM SAID SIGNAL REPEATING DEVICES, A SECOND ANTENNA SHORTER THAN SAID FIRST ANTENNA AND ENTIRELY WITHIN THE FIELD OF SAID FIRST ANTENNA FOR RECEIVING THE SIGNALS REFLECTED FROM SAID SIGNAL REPEATING DEVICES, AND MEANS RESPONSIVE TO THE SIGNALS RECEIVED BY SAID SECOND ANTENNA FOR GATING THE SIGNALS RECEIVED BY SAID FIRST ANTENNA.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |