US3133338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming ceramic capacitors
Assignee: Sprague Electric Co
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Filing: 1962-01-29
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Granted: 1964-05-19
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 John H Fabricius
- 👤 Thomas I Prokopowicz
- 👤 Richard G Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1272; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD FOR MAKING A PHYSICALLY STRONG CERAMIC CAPACITOR COMPRISING CONTACTING A SURFACE OF AN INTERMEDIATE BODY OF A BARIUM TITANATE POWDER WHICH HAS BEEN DOPED WITH AN AGENT FOR PRODUCING SEMICONDUCTIVITY IN SAID POWER WITH A LAYER OF A TITANATE POWER, SUBJECTING THE LAYERED BODY TO COMPRESSION, FIRING THE COMPRESSED BODY IN AIR TO FORM A SINGLE, COHERENT, INTERGRAL UNIT HAVING SEMICONDUCTING ZONE WITH A RESISTIVITY OF LESS THAN ABOUT 1000 OHM-CM. AT 25*C., AND A DIELECTRIC ZONE, APPLYING ONE ELECTRODE TO THE SURFACE OF THE SEMICONDUCTING ZONE AND ANOTHER ELECTRODE TO THE SURFACE OF THE DIELECTRIC ZONE.
Claim 2
Independent Claim
99 words
A METHOD FOR MAKING A PHYSICALLY STRONG CERAMIC CAPACITOR COMPRISING CONTACTING A SURFACE OF AN INTERMEDIATE BODY OF A BARIUM TITANATE POWDER WHICH HAS BEEN DOPED WITH AN AGENT FOR PRODUCING SEMICONDUCTIVITY IN SAID POWER WITH A LAYER OF A TITANATE POWER, SUBJECTING THE LAYERED BODY TO COMPRESSION, FIRING THE COMPRESSED BODY IN AIR TO FORM A SINGLE, COHERENT, INTERGRAL UNIT HAVING SEMICONDUCTING ZONE WITH A RESISTIVITY OF LESS THAN ABOUT 1000 OHM-CM. AT 25*C., AND A DIELECTRIC ZONE, APPLYING ONE ELECTRODE TO THE SURFACE OF THE SEMICONDUCTING ZONE AND ANOTHER ELECTRODE TO THE SURFACE OF THE DIELECTRIC ZONE.
References Cited (Backward Citations)
US3028656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |