US3397388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matrix control circuit
Assignee: International Business Machines Corp
•
Filing: 1963-12-20
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Granted: 1968-08-13
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Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Abramson Paul
- 👤 Pao H Chin
- 👤 Jr George R Stilwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:42
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; H; H03; H03K; H03K17/00; H03K17/51; H03K17/52; H04; H04N; H04N3/00; H04N3/10; H04N3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |