US4408150B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control system and method for electric motor
Assignee: Emerson Electric Co
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Filing: 1981-12-21
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Granted: 1996-12-17
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Expires: 2001-12-21
Abstract
No abstract record available.
Inventors
- 👤 Roger W Holston
- 👤 Carl P Hinsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/16; H02P25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-17 | 2000-06-17 | 2000-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-17 | 2004-06-17 | 2004-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-17 | 2008-06-17 | 2008-12-17 | $7700.00 | Window Closed / Lapsed |