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US2702890A
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Relatively rotating electrical contact with mercury-type contact
Assignee: Standard Oil Development Co
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Filing: 1951-01-17
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Granted: 1955-02-22
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Expires: 1971-01-17
Abstract
No abstract record available.
Inventors
- 👤 Alexander B Hildebrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:59
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/64; H01R39/646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE317313C
Cited
GB141359A
Cited
US1743118A
Cited
US2179693A
Cited
US2255979A
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US2212269A
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US2523081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |