US2420692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic dielectric composition
Assignee: Tam Ceramics LLC
•
Filing: 1943-04-10
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Granted: 1947-05-20
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Expires: 1963-04-10
Abstract
No abstract record available.
Inventors
- 👤 Wainer Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB445495A
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GB453707A
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US2115666A
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US2098812A
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US2071452A
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US2220765A
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GB505165A
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US2277733A
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US2277734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |