US2552174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic alarm selector
Assignee: Amalgamated Wireless Australasia Ltd
•
Filing: 1948-02-14
•
Granted: 1951-05-08
•
Expires: 1968-02-14
Abstract
No abstract record available.
Inventors
- 👤 Holloway Frederick Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:56
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/24; H04L15/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2110015A
Cited
US2094733A
Cited
US2235804A
Cited
GB437539A
Cited
US2441145A
Cited
US2442702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |