US2931992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave impedance branch
Assignee: AT&T Inc
•
Filing: 1956-07-02
•
Granted: 1960-04-05
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Caroselli Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:14
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2149356A
Cited
US2422058A
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US2527477A
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US2442671A
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US2602857A
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US2600278A
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US2510288A
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US2642494A
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US2634383A
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US2816270A
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US2758287A
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US2749523A
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US2770784A
Cited
US2741745A
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US2774946A
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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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |