US2630489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide joint
Assignee: AT&T Inc
•
Filing: 1945-11-06
•
Granted: 1953-03-03
•
Expires: 1965-11-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Beck
- 👤 Harald T Friis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:44
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/04; H01P1/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB503467A
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US2396044A
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US2433368A
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US2407318A
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US2514544A
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US2404086A
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US2400777A
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US2465719A
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US2451876A
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US2434509A
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US2544842A
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US2427100A
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US2489131A
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US2543721A
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US2479220A
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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) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |