Patent US3253159A successfully refreshed from Google Patents.
US3253159A
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US
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Cryogenic memory apparatus
Assignee: International Business Machines Corp
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Filing: 1963-07-05
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Granted: 1966-05-24
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Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 Gerald B Rosenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:55
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/831; Y10S505/838; Y10S505/84
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A CRYOGENIC MEMORY APPARATUS COMPRISING, A STORAGE ELEMENT OF SUPERCONDUCTING MATERIAL HAVING HYSTERESIS IN ITS SUPERCONDUCTIVE-RESISTIVE SWITCHING CHARACTERISTIC, AND CONTROL MEANS FOR SAID ELEMENT COMPRISING, BIAS MEANS OPERATIVE TO CONDITION SAID ELEMENT IN AN OPERATING CONDITION FALLING WITHIN THE HYSTERESIS LOOP DEFINED BY ITS SWITCHING CHARACTERISTICS, BIPOLAR SELECT CONTROL MEANS OPERATIVE TO ADD ALGEBRAICALLY TO SAID BIAS MEANS, AND
References Cited (Backward Citations)
US3119986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |