US2906870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve chain circuits
Assignee: EMI Ltd
•
Filing: 1954-03-23
•
Granted: 1959-09-29
•
Expires: 1974-03-23
Abstract
No abstract record available.
Inventors
- 👤 Huntley Keith Gordon
- 👤 White Eric Lawrence Casling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:06
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/82; G; G11; G11C; G11C19/00; G11C19/20; G11C19/202; H03K17/00; H03K17/51; H03K17/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2536035A
Cited
US2404918A
Cited
US2503662A
Cited
US2594336A
Cited
US2758250A
Cited
US2722630A
Cited
US2802104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |