US2828846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for control of electromagnetically energized brakes and clutches
Assignee: Lansdowne Steel & Iron Co
•
Filing: 1955-04-29
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Granted: 1958-04-01
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Viguers
- 👤 Robert S Work
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:51
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/02; H02P1/04; B; B60; B60L; B60L7/00; B60L7/24; B60T; B60T13/00; B60T13/74; B60T13/748; D; D03; D03D; D03D51/00; D03D51/02; D03D51/06; D03D51/10; F; F16; F16D; F16D67/00; F16D67/02; F16D67/06; H02P13/00; H02P13/10; F16D27/00; F16D2027/002; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2649944A
Cited
US2728878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |