US2749437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trigger circuit
Assignee: Pye Electronic Products Ltd
•
Filing: 1952-03-17
•
Granted: 1956-06-05
•
Expires: 1972-03-17
Abstract
No abstract record available.
Inventors
- 👤 William G Parr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2403984A
Cited
US2604263A
Cited
US2595646A
Cited
US2540442A
Cited
US2591007A
Cited
US2568918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |