Patent US4423386A successfully refreshed from Google Patents.
US2803553A
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Barium titanate ceramic dielectrics
Assignee: Erie Resistor Corp
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Filing: 1953-07-03
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Granted: 1957-08-20
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Expires: 1973-07-03
Abstract
No abstract record available.
Inventors
- 👤 Howard I Oshry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:39
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
51 words
A HIGH DIELECTRIC CONSTANT CERAMIC DIELECTRIC CONSISTING ESSENTIALLY OF A CRYSTAL LATTIES OF BARIUM TITANATE COMBINED WITH IRON AND CALCIUM, THE IRON AND CALCIUM BEING LESS THAN 4% OF THE BARIUM TITANATE BY WEIGHT, AND NEITHER THE IRON NOR THE CALCIUM BEING LESS THAN .3% OF THE BARIUM TITANATE BY WEIGHT.
Claim 2
Dependent Claim
51 words
A HIGH DIELECTRIC CONSTANT CERAMIC DIELECTRIC CONSISTING ESSENTIALLY OF A CRYSTAL LATTIES OF BARIUM TITANATE COMBINED WITH IRON AND CALCIUM, THE IRON AND CALCIUM BEING LESS THAN 4% OF THE BARIUM TITANATE BY WEIGHT, AND NEITHER THE IRON NOR THE CALCIUM BEING LESS THAN .3% OF THE BARIUM TITANATE BY WEIGHT.
References Cited (Backward Citations)
US2695239A
Cited
US2695240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |