US2948628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ceramic dielectric
Assignee: Horizons Inc
•
Filing: 1955-08-02
•
Granted: 1960-08-09
•
Expires: 1975-08-02
Abstract
No abstract record available.
Inventors
- 👤 Wainer Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:09
CPC Classifications
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
151 words
THE METHOD OF PREPARING A TEMPERATURE STABILIZED, NON-AGING, HIGH DIELECTRIC CERAMIC CONSISTING ESSENTIALLY OF AT LEAST ONE FERROELECTRIC MATERIAL SELECTED FROM THE GROUP CONSISTNG OF ALKALINE EARTH METAL TITANATES, LEAD TITANATE, ALKALINE EARTH METAL ZIRCONATES, LEAD ZIRCONATE, ALKALINE EARTH METAL AND ALKALI METAL TANTALATES, TUNGSTATES, AND NIOBATES, ALKALINE EARTH METAL CERATES, LEAD CERATE, AND ALKALINE EARTH METAL STANNATES COMPRISING: PREPARING A CERAMIC MIXTURE OF SAID FERROELECTRIC MATERIAL IN THE FORM OF PARTICLES SUBSTANTIALLY ALL OF WHICH ARE SMALLER THAN ABOUT ONE MICRON IN SIZE, MIXING A READILY DISSIPATED BINDER WITH THE FINELY DIVIDED FERROELECTRIC MATERIAL, FORMING THE MIXTURE INTO A COHERENT BODY AND MAINTAINING SAID BODY AT A TEMPERATURE BETWEEN ABOUT 2400* F. AND ABOUT 2600* F. FOR A TIME NOT EXCEEDING 10 MINUTES, AND RAPIDLY COOLING THE FIRED BODY TO OBTAIN A FINISHED ARTILCE IN WHIICH THE PARTICLE SIZE OF THE INDIVIDUAL CRYSTALLITES IS BETWEEN ABOUT 1 AND 5 MICRONS.
Claim 2
Independent Claim
151 words
THE METHOD OF PREPARING A TEMPERATURE STABILIZED, NON-AGING, HIGH DIELECTRIC CERAMIC CONSISTING ESSENTIALLY OF AT LEAST ONE FERROELECTRIC MATERIAL SELECTED FROM THE GROUP CONSISTNG OF ALKALINE EARTH METAL TITANATES, LEAD TITANATE, ALKALINE EARTH METAL ZIRCONATES, LEAD ZIRCONATE, ALKALINE EARTH METAL AND ALKALI METAL TANTALATES, TUNGSTATES, AND NIOBATES, ALKALINE EARTH METAL CERATES, LEAD CERATE, AND ALKALINE EARTH METAL STANNATES COMPRISING: PREPARING A CERAMIC MIXTURE OF SAID FERROELECTRIC MATERIAL IN THE FORM OF PARTICLES SUBSTANTIALLY ALL OF WHICH ARE SMALLER THAN ABOUT ONE MICRON IN SIZE, MIXING A READILY DISSIPATED BINDER WITH THE FINELY DIVIDED FERROELECTRIC MATERIAL, FORMING THE MIXTURE INTO A COHERENT BODY AND MAINTAINING SAID BODY AT A TEMPERATURE BETWEEN ABOUT 2400* F. AND ABOUT 2600* F. FOR A TIME NOT EXCEEDING 10 MINUTES, AND RAPIDLY COOLING THE FIRED BODY TO OBTAIN A FINISHED ARTILCE IN WHIICH THE PARTICLE SIZE OF THE INDIVIDUAL CRYSTALLITES IS BETWEEN ABOUT 1 AND 5 MICRONS.
References Cited (Backward Citations)
CA507817A
Cited
US2166221A
Cited
US2434079A
Cited
GB691257A
Cited
US2695239A
Cited
US2646359A
Cited
US2695240A
Cited
US2812234A
Cited
US2827360A
Cited
US2758911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |