US3260964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separate amplitude and frequency modulator channels for high and low signals to prevent distortion due to carrier suppression
Assignee: Associated Electrical Industries Ltd
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Filing: 1963-12-09
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Granted: 1966-07-12
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Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Whitehead Cyril Cryer
- 👤 Stanborough Alan James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:08
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/22; H03C3/38; H03C3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A MODULATING CIRCUIT INCLUDING MEANS FOR FEEDING A CARRIER SIGNAL TO PARALLEL CHANNELS SAID CHANNELS INCLUDING A FIRST CHANEL COMPRISING MEANS FOR AMPLITUDE MODULATING THE CARRIER WITH RELATIVELY HIGH FREQUENCY MODULATING SIGNALS AND A FILTER FOR REMOVING THE CARRIER BUT NOT THE SIDE BANDS, A SECOND CHANNEL COMPRISING A $/2 PHASE
Claim 2
Dependent Claim
51 words
A MODULATING CIRCUIT INCLUDING MEANS FOR FEEDING A CARRIER SIGNAL TO PARALLEL CHANNELS SAID CHANNELS INCLUDING A FIRST CHANEL COMPRISING MEANS FOR AMPLITUDE MODULATING THE CARRIER WITH RELATIVELY HIGH FREQUENCY MODULATING SIGNALS AND A FILTER FOR REMOVING THE CARRIER BUT NOT THE SIDE BANDS, A SECOND CHANNEL COMPRISING A $/2 PHASE
References Cited (Backward Citations)
US3162729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |