US2638558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic power transmission
Assignee: FMC Corp
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Filing: 1951-09-01
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Granted: 1953-05-12
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Expires: 1971-09-01
Abstract
No abstract record available.
Inventors
- 👤 Dan R Rankin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:17
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; H02K49/108; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/026; H02K5/00; H02K5/04; H02K5/12; H02K5/128
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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |