US3007142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic flux storage system
Assignee: International Business Machines Corp
•
Filing: 1957-06-06
•
Granted: 1961-10-31
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Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Wang An
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:44
CPC Classifications
H; H03; H03K; H03K25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2772370A
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US2786147A
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US2876438A
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US2812449A
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US2801345A
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US2926339A
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US2902609A
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US2800596A
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US2838669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |