US2689185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic dielectric having a basis of
Assignee: —
•
Filing: —
•
Granted: 1954-09-14
•
Expires: 1971-09-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/16; C04B35/20; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3212; C04B2235/3215; C04B2235/3231; C04B2235/3232; C04B2235/3234; C04B2235/3236; C04B2235/34; C04B2235/3418; C04B2235/70; C04B2235/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR THE PREPARATION OF CERAMIC DIELECTRIC ARTICLES HAVING VERY LOW DIELECTRIC LOOSES AT HIGH FREQUENCIES COMPRISING THE STEPS OF MIXING DOLOMITE AND TITANIUM DIOXIDE IN PROPORTIONS SUITABLE TO FORM A DOUBLE TITANATE OF MAGNESIUM AND CALCIUM, ADDING A FLUXING AGENT IN AN AMOUNT NOT EXCEEDING 15 PER CENT OF THE TOTAL WEIGHT OF THE MIXTURE, AND FIRING SAID MIXTURE AT A TEMPERATURE OF ABOUT 1300* C., THE AMOUNT OF SAID FLUXING AGENT BEING SUFFICIENT TO PROVIDE FOR VITRIFICATION OF THE CERAMIC AT SAID TEMPERATURE.
Claim 2
Dependent Claim
86 words
A PROCESS FOR THE PREPARATION OF CERAMIC DIELECTRIC ARTICLES HAVING VERY LOW DIELECTRIC LOOSES AT HIGH FREQUENCIES COMPRISING THE STEPS OF MIXING DOLOMITE AND TITANIUM DIOXIDE IN PROPORTIONS SUITABLE TO FORM A DOUBLE TITANATE OF MAGNESIUM AND CALCIUM, ADDING A FLUXING AGENT IN AN AMOUNT NOT EXCEEDING 15 PER CENT OF THE TOTAL WEIGHT OF THE MIXTURE, AND FIRING SAID MIXTURE AT A TEMPERATURE OF ABOUT 1300* C., THE AMOUNT OF SAID FLUXING AGENT BEING SUFFICIENT TO PROVIDE FOR VITRIFICATION OF THE CERAMIC AT SAID TEMPERATURE.
References Cited (Backward Citations)
FR956434A
Cited
US1843427A
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GB384473A
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US2140236A
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US2165819A
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US2166221A
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US2218655A
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US2213168A
Cited
US2473960A
Cited
GB598038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |