US2854651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode circuits
Assignee: AT&T Inc
•
Filing: 1953-06-30
•
Granted: 1958-09-30
•
Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Reymond J Kircher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:53
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/24; H03H7/25; H03H7/253; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2612567A
Cited
US2570978A
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US2714702A
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US2658142A
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US2629834A
Cited
US2644896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |