US2860265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroelectric device
Assignee: AT&T Inc
•
Filing: 1954-06-21
•
Granted: 1958-11-11
•
Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Warren P Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:18
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H01G7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2487962A
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US2636135A
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US2650991A
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US2507636A
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US2496293A
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US2632634A
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US2714672A
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US2770741A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |