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US3679945A
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Electric quantity memory element
Assignee: Panasonic Holdings Corp
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Filing: 1970-09-15
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Granted: 1972-07-25
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Expires: 1990-09-15
Abstract
Abstract An electric quantity memory element comprising a first electrode made of a metal electrochemically dissolved or deposited in accordance with Faraday''s laws, a second electrode made of a valve metal and an aqueous solution containing a water soluble salt of the metal of the first electrode as an electrolyte.
Inventors
- 👤 Satoshi Sekido
- 👤 Tomohiko Arita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:55
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/0002; G11C13/0009; B; B82; B82Y; B82Y10/00; G01; G01R; G01R22/00; G01R22/02; H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; H02; H02J; H02J7/00; H02J7/90; H02J7/94; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
17 words
A repeatedly usable memory element according to claim 1, wherein said second electrode consists essentially of tungsten.
Claim 2
Dependent Claim
55 words
A repeatedly usable memory element according to claim 1, wherein said second electrode is sealed with hard glass having a coefficient of thermal expansion substantially equal to that of said metal constituting said second electrode leaving a portion of said second electrode naked, said portion of said second electrode being immersed in said liquid electrolyte.
Claim 3
Dependent Claim
47 words
A repeatedly usable memory element according to claim 1, wherein said first electrode is made of copper and said electrolyte consists of an aqueous solution containing 330 to 380 g/l of Cu(BF4)2, 20 to 60 g/l of HBF4 and 2 to 10 g/l of potassium sodium tartrate.
Claim 4
Dependent Claim
20 words
A repeatedly usable memory element according to claim 4, wherein said electrolyte further contains 40 to 60 g/l of methanol.
Claim 5
Dependent Claim
22 words
A repeatedly usable memory element according to claim 4, wherein said electrolyte further contains 0.2 to 1.0 g/l of p-phenol sulfonic acid.
Claim 6
Dependent Claim
39 words
A repeatedly usable memory element according to claim 1, wherein said first electrode is made of silver and said electrolyte consists of an aqueous solution containing 80 to 120 g/l of Ag3PO4 and 700 to 900 g/l of H3PO4.
Claim 7
Dependent Claim
22 words
A repeatedly usable memory element according to claim 7, wherein said electrolyte further contains 0.2 to 1.0 g/l of p-phenol sulfonic acid.
Claim 8
Dependent Claim
28 words
A repeatedly usable memory element according to claim 1, wherein said second electrode is in the form of a rod and is concentrically surrounded by said first electrode.
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |