Patent US2833945A successfully refreshed from Google Patents.
US2833945A
Expired / Lapsed
US
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Foucault current apparatus and especially braking apparatus
Assignee: Telma SAS
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Filing: 1955-03-30
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Granted: 1958-05-06
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Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Bessiere Pierre Etienne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:34
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US294719A
Cited
FR771976A
Cited
US2395904A
Cited
FR1005416A
Cited
BE495878A
Cited
US2700343A
Cited
US2758231A
Cited
FR1026998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |