US2829979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic pieces of high dielectric constant and process of their manufacture
Assignee: Thales SA
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Filing: 1954-01-12
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Granted: 1958-04-08
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Expires: 1974-01-12
Abstract
No abstract record available.
Inventors
- 👤 Calis Micheline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:37
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/10; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
PROCESS FOR MAKING A DENSE CERAMIC DIELECTRIC PRODUCT, AFFORDING A HIGH DIELECTRIC CONSTANT, VARYING RELATIVELY LITTLE WITH TEMPERATURE BETWEEN -20* AND +60*C. AND BEING MAXIMUM AT ABOUT 45*C., WHICH COMPRISES THE STEPS OF: MAKING A SUBSTANTIALLY EQUIMOLAR MIXTURE OF POWDERED TITANIUM DIOXIDE AND POWDERED BARIUM CARBONATE, FIRING SAID MIXTURE TO A TEMPERATURE BETWEEN 1200* AND 1400*C., CRUSHING THE FIRED PRODUCT TO A POWDER, MIXING THEREWITH BY WEIGHT FOR 100 PARTS OF BARIUM TITANATE, 0.5 TO 10 PARTS OF LANTHANUM OXIDE AND 0.1 TO 0.3 PART OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF PBO AND GEO2, INCORPORATING AN ORGANIC BINDER TO CONVERT THE MIXTURE TO A PASTE, FORMING THE SAID PASTE AND FIRING THE SAME TO A TEMPERATURE BETWEEN 1200 TO 1400*C.
Claim 2
Dependent Claim
125 words
PROCESS FOR MAKING A DENSE CERAMIC DIELECTRIC PRODUCT, AFFORDING A HIGH DIELECTRIC CONSTANT, VARYING RELATIVELY LITTLE WITH TEMPERATURE BETWEEN -20* AND +60*C. AND BEING MAXIMUM AT ABOUT 45*C., WHICH COMPRISES THE STEPS OF: MAKING A SUBSTANTIALLY EQUIMOLAR MIXTURE OF POWDERED TITANIUM DIOXIDE AND POWDERED BARIUM CARBONATE, FIRING SAID MIXTURE TO A TEMPERATURE BETWEEN 1200* AND 1400*C., CRUSHING THE FIRED PRODUCT TO A POWDER, MIXING THEREWITH BY WEIGHT FOR 100 PARTS OF BARIUM TITANATE, 0.5 TO 10 PARTS OF LANTHANUM OXIDE AND 0.1 TO 0.3 PART OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF PBO AND GEO2, INCORPORATING AN ORGANIC BINDER TO CONVERT THE MIXTURE TO A PASTE, FORMING THE SAID PASTE AND FIRING THE SAME TO A TEMPERATURE BETWEEN 1200 TO 1400*C.
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |