US2853041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level alarm device
Assignee: Individual
•
Filing: 1956-09-28
•
Granted: 1958-09-23
•
Expires: 1976-09-28
Abstract
No abstract record available.
Inventors
- 👤 William E Oakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:53
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04; E; E21; E21B; E21B47/00; E21B47/04; E21B47/047; F; F22; F22B; F22B37/00; F22B37/02; F22B37/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2774324A
Cited
US2786437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |