US2657587A
Expired / Lapsed
US
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Speed controllable drive with electromagnetic gear couplings
Assignee: Siemens Schuckertwerke AG
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Filing: 1951-04-06
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Granted: 1953-11-03
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Expires: 1971-04-06
Abstract
No abstract record available.
Inventors
- 👤 Volk Paul
- 👤 Spiesecke Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:20
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/0405; F; F16; F16D; F16D48/00; F16D48/06; F16D48/064; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1021; F16D2500/1022; F16D2500/50; F16D2500/508; F16D2500/50858; F16D2500/52; F16D2500/525; F16D2500/70; F16D2500/704; F16D2500/70464; F16D2500/70488; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19437
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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |