Patent US3549837A successfully refreshed from Google Patents.
US3549837A
Expired / Lapsed
US
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Differential pressure switch with improved magnetic piston actuator means
Assignee: Bendix Corp
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Filing: 1968-09-24
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Granted: 1970-12-22
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Expires: 1988-09-24
Abstract
No abstract record available.
Inventors
- 👤 Charles M Barnes
- 👤 Howard R Jilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:00
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/226; H; H01; H01H; H01H35/00; H01H35/24; H01H35/38; H01H36/00; H01H36/0006; H01H36/0013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |