Patent US3712293A successfully refreshed from Google Patents.
US2553084A
Expired / Lapsed
US
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Apparatus under control of telephone bell that is remotely operated
Assignee: Individual
•
Filing: 1948-11-18
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Granted: 1951-05-15
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Expires: 1968-11-18
Abstract
No abstract record available.
Inventors
- 👤 Favre Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:30
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/007; G; G08; G08C; G08C19/00; G08C19/16; G08C19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US275296A
Cited
US1765554A
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US854543A
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US1726947A
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US1712725A
Cited
US1820354A
Cited
US2021382A
Cited
US2253840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |