US3467828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A.c. latching circuit for scr having photoresistive latching
Assignee: Sprague Electric Co
•
Filing: 1966-12-21
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Granted: 1969-09-16
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Expires: 1986-12-21
Abstract
No abstract record available.
Inventors
- 👤 Rudolf F Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:37
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/962; H02; H02M; H02M1/00; H02M1/08; H02M1/088; H02M1/092; H03K17/51; H03K17/56; H03K17/72; H03K17/725
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3294974A
Cited
US3307071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |