Patent US3142044A successfully refreshed from Google Patents.
US3142044A
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Ceramic memory element
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1961-05-17
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Granted: 1964-07-21
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Expires: 1981-05-17
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Kaufman
- 👤 Leon H Steinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:59
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/22; G11C11/56; G11C11/5657
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A NON-DESTRUCTIVE MEMORY FOR STORING BIVALUED BITS OF INFORMATION, SAID COMBINATION COMPRISING: A NONOMORPHIC FERROELECTRIC ELEMENT HAVING FIRST AND SECOND STATES OF POLARIZATION A FIRST PORTION OF SAID MONOMORPHIC FERROELECTRIC ELEMENT BEING PERMANENTLY POLARIZED IN SAID FIRST STATE; FIRST MEANS FOR SELECTIVELY APPLYING AN ELECTRIC FIELD ACROSS THE FIRST PORTION OF SAID FERROELECTRIC ELEMENT TO PHYSICALLY DEFORM SAID FERROELECTRIC ELEMENT; AND A CONDUCTOR POSITIONED ADJACENT SAID FERROELECTRIC ELEMENT, SAID FERROELECTRIC ELEMENT BEING RESPONSIVE TO THE AP-
Claim 2
Dependent Claim
77 words
IN A NON-DESTRUCTIVE MEMORY FOR STORING BIVALUED BITS OF INFORMATION, SAID COMBINATION COMPRISING: A NONOMORPHIC FERROELECTRIC ELEMENT HAVING FIRST AND SECOND STATES OF POLARIZATION A FIRST PORTION OF SAID MONOMORPHIC FERROELECTRIC ELEMENT BEING PERMANENTLY POLARIZED IN SAID FIRST STATE; FIRST MEANS FOR SELECTIVELY APPLYING AN ELECTRIC FIELD ACROSS THE FIRST PORTION OF SAID FERROELECTRIC ELEMENT TO PHYSICALLY DEFORM SAID FERROELECTRIC ELEMENT; AND A CONDUCTOR POSITIONED ADJACENT SAID FERROELECTRIC ELEMENT, SAID FERROELECTRIC ELEMENT BEING RESPONSIVE TO THE AP-
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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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |