US2483214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone alarm call system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1945-04-16
•
Granted: 1949-09-27
•
Expires: 1965-04-16
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Lomax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:33
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/432
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US481483A
Cited
US549346A
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US940692A
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US1358720A
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US1369146A
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US1981689A
Cited
US2298489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-26 | 1953-03-28 | 1953-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-26 | 1957-03-28 | 1957-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-26 | 1961-03-28 | 1961-09-27 | $7700.00 | Window Closed / Lapsed |