Patent US2780671A successfully refreshed from Google Patents.
US2780671A
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US
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Telephonic alarm system
Assignee: Individual
•
Filing: 1952-01-30
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Granted: 1957-02-05
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Expires: 1972-01-30
Abstract
No abstract record available.
Inventors
- 👤 Thery Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:40
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04; H04M11/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1974551A
Cited
US2099913A
Cited
US2062822A
Cited
US2121282A
Cited
US2195627A
Cited
US2498613A
Cited
US2555714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |