US3325731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency measuring system using folding bandwidths
Assignee: Individual
•
Filing: 1964-07-24
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Granted: 1967-06-13
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Expires: 1984-07-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Herbert W Headle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:20
CPC Classifications
H; H03; H03M; H03M1/00; G; G01; G01R; G01R23/00; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S7/00; G01S7/02; G01S7/28; H03M1/12; H03M1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A SYSTEM FOR DETERMINING THE FREQUENCY OF A RECEIVED SIGNAL IN A BANDWIDTH RECEIVER CONSISTING OF: A FIRST OSCILLATOR HAVING A FREQUENCY EQUAL TO THE FREQUENCY AT ONE END OF SAID BANDWIDTH; A FIRST MIXER CONNECTED TO THE RECEIVER AND TO THE FIRST OSCILLATOR; A FIRST FILTER CONNECTED TO THE FIRST MIXER ALLOWING A FIRST FRACTION OF THE BANDWIDTH TO PASS, THE FIRST FRACTION BEING ONE-HALF OF THE OUTPUT OF THE FIRST MIXER TAKEN AT ONE END THEREOF; A FIRST VOLTAGE SENSING MEANS CONNECTED TO THE OUTPUT OF THE FIRST FILTER FOR INDICATING THE PRESENCE OF A SIGNAL WITHIN THE FIRST FRACTION; A SECOND OSCILLATOR HAVING A FREQUENCY EQUAL TO THE CENTER OF THE BANDWIDTH; A SECOND MIXER CONNECTED TO THE RE-
Claim 2
Independent Claim
122 words
A SYSTEM FOR DETERMINING THE FREQUENCY OF A RECEIVED SIGNAL IN A BANDWIDTH RECEIVER CONSISTING OF: A FIRST OSCILLATOR HAVING A FREQUENCY EQUAL TO THE FREQUENCY AT ONE END OF SAID BANDWIDTH; A FIRST MIXER CONNECTED TO THE RECEIVER AND TO THE FIRST OSCILLATOR; A FIRST FILTER CONNECTED TO THE FIRST MIXER ALLOWING A FIRST FRACTION OF THE BANDWIDTH TO PASS, THE FIRST FRACTION BEING ONE-HALF OF THE OUTPUT OF THE FIRST MIXER TAKEN AT ONE END THEREOF; A FIRST VOLTAGE SENSING MEANS CONNECTED TO THE OUTPUT OF THE FIRST FILTER FOR INDICATING THE PRESENCE OF A SIGNAL WITHIN THE FIRST FRACTION; A SECOND OSCILLATOR HAVING A FREQUENCY EQUAL TO THE CENTER OF THE BANDWIDTH; A SECOND MIXER CONNECTED TO THE RE-
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |