US3492426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone alarm system where a central station alerts a preselected agency in response to a received pulse coded frequency signal identifying a particular alarm condition at a particular subscriber station
Assignee: Individual
•
Filing: 1965-03-18
•
Granted: 1970-01-27
•
Expires: 1985-03-18
Abstract
No abstract record available.
Inventors
- 👤 Davis Sidney Foreman
- 👤 Lance Henriques Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:36
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04; H04M11/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124650A
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US3029642A
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US2870258A
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US3062920A
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US3095478A
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US3087991A
Cited
US3178658A
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US3207850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |