US2701303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic valve circuits
Assignee: National Research Development Corp UK
•
Filing: 1950-03-01
•
Granted: 1955-02-01
•
Expires: 1970-03-01
Abstract
No abstract record available.
Inventors
- 👤 Wells Frank Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:49
CPC Classifications
G; G11; G11C; G11C27/00; G11C27/02; G11C27/024; H; H03; H03K; H03K25/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2008563A
Cited
US2095124A
Cited
US2396439A
Cited
US2415567A
Cited
US2487191A
Cited
US2486391A
Cited
US2498678A
Cited
US2479881A
Cited
US2602918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |