US2942247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm warning system for swimming pools
Assignee: Individual
•
Filing: 1956-11-06
•
Granted: 1960-06-21
•
Expires: 1976-11-06
Abstract
No abstract record available.
Inventors
- 👤 Carl C Lienau
- 👤 Jr Joseph C Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:22
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/02; G08B21/08; G08B21/082
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |