Patent US2593155A successfully refreshed from Google Patents.
US2593155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cavity resonator
Assignee: AT&T Inc
•
Filing: 1947-03-07
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Granted: 1952-04-15
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Expires: 1967-03-07
Abstract
No abstract record available.
Inventors
- 👤 John P Kinzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:15
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2439388A
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US2513334A
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US2426177A
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US2471419A
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US2496772A
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US2458579A
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US2476034A
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US2501545A
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US2527619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |