US3452332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory device and method of information handling utilizing charge transfer between rare earth ions
Assignee: International Business Machines Corp
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Filing: 1965-01-05
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Granted: 1969-06-24
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Expires: 1985-01-05
Abstract
No abstract record available.
Inventors
- 👤 Walter E Bron
- 👤 William R Heller
- 👤 Benjamin Welber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:52
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/041; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7704; C09K11/7705; C09K11/7783; C09K11/779; C09K11/7791; C09K9/00; F; F21; F21K; F21K2/00; G02; G02F; G02F1/00; G02F2/00; G02F2/02; G11C13/048; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/14; H01J29/18; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/122; H03; H03K; H03K3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563472A
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US3152085A
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US3253497A
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US3250722A
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US3269847A
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US3341825A
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US3296594A
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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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |