US2518174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic alarm system
Assignee: Individual
•
Filing: 1948-01-07
•
Granted: 1950-08-08
•
Expires: 1968-01-07
Abstract
No abstract record available.
Inventors
- 👤 Picking Alfred Samuel Horace
- 👤 Rooney Ian Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:35
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04; H04M11/045; G; G08; G08B; G08B19/00; G08B19/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1799512A
Cited
US1867500A
Cited
US2090574A
Cited
US2161525A
Cited
US2191971A
Cited
US2371051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |