US2888737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High dielectric constant material
Assignee: Sprague Electric Co
•
Filing: 1952-12-30
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Granted: 1959-06-02
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Expires: 1972-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:36
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H01G7/026; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR MAKING A FERROWLECTRIC MEMBER, SAID PROCESS BEING CHARACTERIZED BY THE STEPS OF PROVIDING A SLIP OF FINELY DIVIDED FERROELECTRIC CERAMIC PARTICLES HAVING SUBSTANTIALLY SINGLE DOMAIN CRYSTAL STRUCTURES, SUBJECTING THE SLIT TO A CRYSTAL-ORIENTING ELECTRIC FIELD, DRYING AND FIRING THE ORIENTED MATERIAL TO SINTER THE PARTICLES TOGETHER AND FORM A COHERENT BYDY AND ELECTRICALLY POLARIZING THE RESULTING BODY.
Claim 2
Dependent Claim
60 words
A PROCESS FOR MAKING A FERROWLECTRIC MEMBER, SAID PROCESS BEING CHARACTERIZED BY THE STEPS OF PROVIDING A SLIP OF FINELY DIVIDED FERROELECTRIC CERAMIC PARTICLES HAVING SUBSTANTIALLY SINGLE DOMAIN CRYSTAL STRUCTURES, SUBJECTING THE SLIT TO A CRYSTAL-ORIENTING ELECTRIC FIELD, DRYING AND FIRING THE ORIENTED MATERIAL TO SINTER THE PARTICLES TOGETHER AND FORM A COHERENT BYDY AND ELECTRICALLY POLARIZING THE RESULTING BODY.
References Cited (Backward Citations)
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Cited
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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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |