Patent US2748219A successfully refreshed from Google Patents.
US2748219A
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US
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Hydraulic pressure operated switch
Assignee: Individual
•
Filing: 1953-02-16
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Granted: 1956-05-29
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Expires: 1973-02-16
Abstract
No abstract record available.
Inventors
- 👤 J D Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:46
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34; H01H35/26; H01H35/2607; H01H35/2628
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US708155A
Cited
US1951245A
Cited
US2404843A
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US2435143A
Cited
US2428096A
Cited
US2492261A
Cited
US2562385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |