US2977485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode-transformer gating circuit
Assignee: Digital Equipment Corp
•
Filing: 1958-11-28
•
Granted: 1961-03-28
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Expires: 1978-11-28
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/01; H03K3/012; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/601
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2778978A
Cited
US2764688A
Cited
US2885549A
Cited
US2848608A
Cited
US2932795A
Cited
US2903606A
Cited
US2809303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |