Patent US3719933A successfully refreshed from Google Patents.
US3719933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory device having lead dioxide particles therein
Assignee: Panasonic Holdings Corp
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Filing: 1971-03-29
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Granted: 1973-03-06
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Expires: 1991-03-29
Abstract
Abstract A memory device for memorizing an electric signal. Said memory device has an organic resin film having lead dioxide particles dispersed therein, a positive electrode, and a negative electrode. The memory device has a high electrical resistance state and a low electrical resistance state. An applied electric signal at a critical voltage and with forward polarity can transform the memory device from the high electrical resistance state to the low electrical resistance state. An applied electric erasing signal at a pre-determined voltage with reverse polarity can return the memory device from the low electrical resistance state to the high electrical resistance state.
Inventors
- 👤 T Wakabayashi
- 👤 K Sugihara
- 👤 T Kinugasa
- 👤 S Hozumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:04
CPC Classifications
H; H10; H10N; H10N70/00; H10N70/20; B; B82; B82Y; B82Y10/00; G; G11; G11C; G11C13/00; G11C13/0002; G11C13/0009; G11C13/0014; G11C13/0016; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H10N70/011; H10N70/021; H10N70/801; H10N70/881
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
33 words
A memory device comprising an organic resin film having lead dioxide particles dispersed therein, and a positive electrode and a negative electrode applied to the respective opposite surfaces of said organic resin film.
Claim 2
Dependent Claim
33 words
A memory device comprising an organic resin film having lead dioxide particles dispersed therein, and a positive electrode and a negative electrode applied to the respective opposite surfaces of said organic resin film.
Claim 3
Dependent Claim
24 words
A memory device as claimed in claim 1, wherein said lead dioxide particles have an average particle size of 0.1 micron to 5 microns.
Claim 4
Dependent Claim
28 words
A memory device as claimed in claim 1, wherein said lead dioxide particles are dispersed in said organic resin film at an average spacing of 500 to 5,000A.
Claim 5
Dependent Claim
37 words
A memory device as claimed in claim 1, wherein said positive electrode consists essentially of one member selected from the group consisting of gold, silver, copper, carbon black or graphite, stannic oxide, cadmium oxide, and lead dioxide.
Claim 6
Dependent Claim
28 words
A memory device as claimed in claim 5, wherein said negative electrode consists essentially of one metal selected from the group consisting of aluminum, titanium, tantalum, and zinc.
Claim 7
Dependent Claim
23 words
A memory device as claimed in claim 5, wherein said negative electrode has an oxide layer in contact with said organic resin film.
Claim 8
Dependent Claim
22 words
A memory device as claimed in claim 1, wherein said organic resin film has a thickness of 5 microns to 500 microns.
Claim 9
Dependent Claim
18 words
A memory device as claimed in clAim 1, wherein said organic resin consists essentially of a thermo-setting resin.
Claim 10
Dependent Claim
18 words
A memory device as claimed in claim 1, wherein said organic resin consists essentially of a thermo-plastic resin.
Claim 11
Dependent Claim
17 words
A memory device as claimed in claim 9, wherein said organic resin consists of a chlorinated rubber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |