US3519740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for receiving signals in which the local oscillator frequency is made equal to the carrier frequency of incoming signals
Assignee: International Standard Electric Corp
•
Filing: 1966-11-08
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Granted: 1970-07-07
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Expires: 1986-11-08
Abstract
No abstract record available.
Inventors
- 👤 Gerhard-Guenter Gassmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:55
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/2281; H03C; H03C3/00; H03C3/02; H03C3/06; H03D3/00; H03D3/001; H03D3/003; H03D3/004; H03D5/00; H04; H04B; H04B15/00; H04B15/02; H04B15/04; H04B15/06; H04N; H04N5/00; H04N5/44; H04N5/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3057954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |