US2805090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid seals for gas-cooled dynamo electric machines
Assignee: Metropolitan Vickers Electrical Co Ltd
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Filing: 1954-07-01
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Granted: 1957-09-03
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Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Creek Frederick Ronal Leverett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:30
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/124; F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; F16J15/3408; F16J15/3412; F16J15/342; F16J15/40
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |