US2442016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable-intensity electromagnetic audible-signal device
Assignee: Individual
•
Filing: 1945-09-27
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Granted: 1948-05-25
•
Expires: 1965-09-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
G; G10; G10K; G10K1/00; G10K1/06; G10K1/062; G10K1/063; G10K1/064; G10K1/0645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-25 | 1951-11-24 | 1952-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-25 | 1955-11-24 | 1956-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-25 | 1959-11-24 | 1960-05-25 | $7700.00 | Window Closed / Lapsed |