US2745956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode protection circuit
Assignee: International Business Machines Corp
•
Filing: 1951-12-31
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Granted: 1956-05-15
•
Expires: 1971-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles T Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:38
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1153172A
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US2515224A
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US2473853A
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US2594916A
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US2553284A
Cited
US2698883A
Cited
US2693533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |