US3248659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High efficiency discriminator
Assignee: AT&T Inc
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Filing: 1962-12-07
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Granted: 1966-04-26
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Expires: 1982-12-07
Abstract
No abstract record available.
Inventors
- 👤 Adolph J Giger
- 👤 Arthur F Perks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
APPARATUS FOR RECOVERING SIGNAL INTELLIGENCE FROM A FREQUENCY MODULATED CURRENT WHICH COMPRISES MEANS FOR CONVERTING FREQUENCY VARIATIONS ABOVE THE CENTER FREQUENCY OF THE MODULATED CURRENT TO AMPLITUDE VARIATIONS, MEANS FOR CONVERTING FREQUENCY VARIATIONS BELOW THE CENTER FREQUENCY OF THE MODULATED CURRENT TO AMPLITUDE VARIATIONS, MEANS FOR INDEPENDENTLY RECTIFYING POSITIVE AND NEGATIVE AMPLITUDE EXCURSIONS OF SIGNALS FROM BOTH OF SAID CONVERSIONS, AND MEANS FOR ALGEBRAICALLY COMBINING SAID RECOVERED SIGNALS TO FORM A COMPOSITE OUTPUT SIGNAL.
Claim 2
Dependent Claim
74 words
APPARATUS FOR RECOVERING SIGNAL INTELLIGENCE FROM A FREQUENCY MODULATED CURRENT WHICH COMPRISES MEANS FOR CONVERTING FREQUENCY VARIATIONS ABOVE THE CENTER FREQUENCY OF THE MODULATED CURRENT TO AMPLITUDE VARIATIONS, MEANS FOR CONVERTING FREQUENCY VARIATIONS BELOW THE CENTER FREQUENCY OF THE MODULATED CURRENT TO AMPLITUDE VARIATIONS, MEANS FOR INDEPENDENTLY RECTIFYING POSITIVE AND NEGATIVE AMPLITUDE EXCURSIONS OF SIGNALS FROM BOTH OF SAID CONVERSIONS, AND MEANS FOR ALGEBRAICALLY COMBINING SAID RECOVERED SIGNALS TO FORM A COMPOSITE OUTPUT SIGNAL.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |