Patent US2422877A successfully refreshed from Google Patents.
US3201595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory systems using tunnel diodes
Assignee: RCA Corp
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Filing: 1959-06-16
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Granted: 1965-08-17
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Expires: 1979-06-16
Abstract
No abstract record available.
Inventors
- 👤 Miller James Cohean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:03
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/36; G11C11/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A MEMORY SYSTEM COMPRISING A FIELD EFFECT STORAGE DEVICE HAVING TWO OPERATING STATES, A HOLD CIRCUIT INCLUDING A NEGATIVE RESISTANCE DIODE ELEMENT, SAID DIODE HAVING A HIGH AND A LOW VOLTAGE OPERATING STATE CORRESPONDING TO THE ONE AND THE OTHER OF SAID STORAGE DEVICE OPERATING STATES, A DECOUPLING ELEMENT CONNECTING SAID DIODE TO SAID STORAGE DEVICE, MEANS COUPLED TO SAID STORAGE DEVICE AND ALSO COUPLED ACROSS SAID DIODE TO SET SAID STORAGE DEVICE TO ONE OF ITS TWO OPERATING STATES AND TO ALSO SET SAID DIODE IN THE CORRESPONDING ONE OF SAID HIGH AND LOW STATES, AND MEANS FOR APPLYING ENERGIZING SIGNALS ACROSS SAID DIODE TO MAINTAIN SAID SET STATE.
Claim 2
Dependent Claim
110 words
A MEMORY SYSTEM COMPRISING A FIELD EFFECT STORAGE DEVICE HAVING TWO OPERATING STATES, A HOLD CIRCUIT INCLUDING A NEGATIVE RESISTANCE DIODE ELEMENT, SAID DIODE HAVING A HIGH AND A LOW VOLTAGE OPERATING STATE CORRESPONDING TO THE ONE AND THE OTHER OF SAID STORAGE DEVICE OPERATING STATES, A DECOUPLING ELEMENT CONNECTING SAID DIODE TO SAID STORAGE DEVICE, MEANS COUPLED TO SAID STORAGE DEVICE AND ALSO COUPLED ACROSS SAID DIODE TO SET SAID STORAGE DEVICE TO ONE OF ITS TWO OPERATING STATES AND TO ALSO SET SAID DIODE IN THE CORRESPONDING ONE OF SAID HIGH AND LOW STATES, AND MEANS FOR APPLYING ENERGIZING SIGNALS ACROSS SAID DIODE TO MAINTAIN SAID SET STATE.
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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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |