Patent US2889538A successfully refreshed from Google Patents.
US2889538A
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US
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Gas tube storage matrix
Assignee: International Business Machines Corp
•
Filing: 1953-01-29
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Granted: 1959-06-02
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Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Helmut J Geisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:23
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/26; G11C11/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2401657A
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US2556614A
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US2485617A
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US2709042A
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US2619618A
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US2635214A
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US2706079A
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US2762016A
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US2750580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |