US2419942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow actuated switch
Assignee: Fischer and Porter Co
•
Filing: 1943-10-18
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Granted: 1947-05-06
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Expires: 1963-10-18
Abstract
No abstract record available.
Inventors
- 👤 Brewer Nathaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:06
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01F1/24; G01P; G01P13/00; G01P13/0006; G01P13/0013; G01P13/002; H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; H01H35/405; H01H36/00; H01H36/02
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) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |