Patent US2877422A successfully refreshed from Google Patents.
US2877422A
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US
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Modulators for electric oscillations
Assignee: British Telecommunications PLC
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Filing: 1951-04-30
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Granted: 1959-03-10
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Expires: 1971-04-30
Abstract
No abstract record available.
Inventors
- 👤 Dennis G Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:01
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C3/00; H03C3/38; H03C3/40
Claims Analysis
Total Claims: 0
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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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |