US3047857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency indicator alarm
Assignee: Individual
•
Filing: 1955-11-30
•
Granted: 1962-07-31
•
Expires: 1975-11-30
Abstract
No abstract record available.
Inventors
- 👤 Charles W Rockett
- 👤 Lawrence N Higgins
- 👤 Vernon E Terp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:49
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266401A
Cited
US2885665A
Cited
US2412974A
Cited
US2494339A
Cited
US2537102A
Cited
US2648060A
Cited
GB618519A
Cited
US2552174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |