US3404344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time measuring circuits
Assignee: National Research Development Corp UK
•
Filing: 1965-05-10
•
Granted: 1968-10-01
•
Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Riddle Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:29
CPC Classifications
G; G04; G04F; G04F10/00; G04F10/10; H; H03; H03K; H03K5/00; H03K5/22; H03K5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2636133A
Cited
US3056083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |