Patent US2533140A successfully refreshed from Google Patents.
US2533140A
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Barium titanate-stannic oxide ceramic
Assignee: Zenith Electronics LLC
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Filing: 1948-12-15
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Granted: 1950-12-05
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Expires: 1968-12-15
Abstract
No abstract record available.
Inventors
- 👤 Antonio R Rodriguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:26
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
28 words
A VITRIFIED CERAMIC MATERIAL CONSISTING ESSENTIALLY OF BARIUM TITANATE IN AN AMOUNT GREATER THAN 96% BY WEIGHT AND STANNIC OXIDE IN AN AMOUNT LESS THAN 4% BY WEIGHT.
Claim 2
Dependent Claim
28 words
A VITRIFIED CERAMIC MATERIAL CONSISTING ESSENTIALLY OF BARIUM TITANATE IN AN AMOUNT GREATER THAN 96% BY WEIGHT AND STANNIC OXIDE IN AN AMOUNT LESS THAN 4% BY WEIGHT.
References Cited (Backward Citations)
US2402515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |