US2883534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay stages for electrical pulses
Assignee: Ferranti International PLC
•
Filing: 1955-10-14
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Granted: 1959-04-21
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Expires: 1975-10-14
Abstract
No abstract record available.
Inventors
- 👤 Scarrott Gordon George
- 👤 Harwood William John
- 👤 Johnson Kenneth Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:02
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/13; H03K5/14; H03H; H03H11/00; H03H11/02; H03H11/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1828454A
Cited
US2678997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |