US2870437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Ferranti International PLC
•
Filing: 1956-11-19
•
Granted: 1959-01-20
•
Expires: 1976-11-19
Abstract
No abstract record available.
Inventors
- 👤 Scarrott Gordon George
- 👤 Johnson Kenneth Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:46
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/82; H03M1/822; H03M1/827; H03M1/86
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2641698A
Cited
US2736889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |