US2561455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for phase modulation
Assignee: Autophon AG
•
Filing: 1948-03-05
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Granted: 1951-07-24
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Expires: 1968-03-05
Abstract
No abstract record available.
Inventors
- 👤 Zschokke Diethelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:00
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1950406A
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US1900538A
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US1901694A
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US2045107A
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US2042234A
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US2125127A
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US2160528A
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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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |