US2887546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure, explosion proof, fluid flow controlled electrical switch
Assignee: W E ANDERSON Inc
•
Filing: 1957-06-26
•
Granted: 1959-05-19
•
Expires: 1977-06-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Hatfield
- 👤 Raymond C Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:57
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US384570A
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US2203331A
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US2204161A
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US2310504A
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US2307304A
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US2600309A
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US2869475A
Cited
FR1055183A
Cited
US2773251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |