US3679945A
Expired / Lapsed
US
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Electric quantity memory element
Assignee: Panasonic Holdings Corp
•
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 03:09
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.
References Cited (Backward Citations)
US2710369A
Cited
US3052830A
Cited
US3158798A
Cited
US3275901A
Cited
US3423648A
Cited
US3423643A
Cited
US3423642A
Cited
US3512049A
Cited
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 |