US2616443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective arrangement for electrical apparatus operating in an insulating liquid
Assignee: Micafil AG
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Filing: 1950-08-21
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Granted: 1952-11-04
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Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Bram Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:54
CPC Classifications
H; H02; H02H; H02H5/00; H02H5/08; H01; H01F; H01F27/00; H01F27/40; H01F27/402; H01F27/404; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/55; H01H33/555; H01H35/00; H01H35/18; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/8158; Y10T137/8342; Y10T137/8593; Y10T137/86187
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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |