US3569795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-variable, ferroelectric capacitor
Assignee: United States Department of the Army
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Filing: 1969-05-29
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Granted: 1971-03-09
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Expires: 1989-05-29
Abstract
Abstract This disclosure discusses voltage-variable capacitors, including ferroelectric, ceramic-dielectric capacitors that are variable by control of the potential gradients within their dielectric material. This disclosure describes voltage-variable, dielectric capacitors that have a plurality of electrodes spaced throughout the dielectric with control-voltage potentials of alternately opposing polarity to achieve a higher potential gradient within the dielectric than would be possible from a given control voltage supply to a single pair of electrodes on opposing sides of the dielectric.
Inventors
- 👤 Emanuel Gikow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:32
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
In a voltage-variable capacitor as in claim 1, said electrodes connected to said one polarity of a said source of control voltage interleaving said electrodes connected to said other polarity of said source of control voltage.
Claim 2
Dependent Claim
48 words
In a voltage-variable capacitor as in claim 1, said means for connecting said one polarity and said other polarity of said source of control voltage to said electrodes including resistors having a high resistive value with respect to the AC impedance between said opposing terminal in said circuit.
Claim 3
Dependent Claim
21 words
In a voltage-variable capacitor as in claim 1, said additional electrodes being spaced at regular intervals, sequentially, between said opposing electrodes.
Claim 4
Dependent Claim
45 words
In a voltage-variable capacitor as in claim 4, said one polarity of said source of control voltage being connected to the even electrode of said sequence and said other polarity of said source of control voltage being connected to the odd electrodes of said sequence.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |