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US3463993A
Expired / Lapsed
US
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High speed-high impedance electrical switch
Assignee: International Business Machines Corp
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Filing: 1966-12-27
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Granted: 1969-08-26
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 John William Beck
- 👤 Charles John Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:11
CPC Classifications
G; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2902674A
Cited
US3214601A
Cited
US3158758A
Cited
US3274444A
Cited
US3321747A
Cited
US3322974A
Cited
US3406346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |