US3441827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control systems for direct current electric motors
Assignee: Linde Material Handling UK Ltd
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Filing: 1966-07-13
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Granted: 1969-04-29
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Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 Ivan Salisbury Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
H; H03; H03F; H03F9/00; H03F9/02; B; B60; B60L; B60L15/00; B60L15/02; B60L15/08; B60L50/00; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/281; H02P7/30; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/913; Y10S388/917
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) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |