US2833920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic matrix commutator
Assignee: International Business Machines Corp
•
Filing: 1953-03-30
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Granted: 1958-05-06
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Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore L Buley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:56
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2049763A
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US2136441A
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US2195864A
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US2308778A
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US2465355A
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US2443198A
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US2686299A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |