US2642473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave translating system
Assignee: AT&T Inc
•
Filing: 1944-12-07
•
Granted: 1953-06-16
•
Expires: 1964-12-07
Abstract
No abstract record available.
Inventors
- 👤 Jr John G Kreer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:37
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/20; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1564303A
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US1839290A
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US2238129A
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US2166991A
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US2213874A
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US2234587A
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US2247546A
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US2305614A
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US2411916A
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US2411876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |