US2763823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural electric motor variable speed drive
Assignee: NEW CONS GOLD FIELDS Ltd
•
Filing: 1952-07-14
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Granted: 1956-09-18
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Expires: 1972-07-14
Abstract
No abstract record available.
Inventors
- 👤 Horace E J Symes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:57
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/68; H02P5/69; H02P5/695; B; B60; B60L; B60L15/00; B60L15/20; B60L15/2009; B60L15/2054; B60L3/00; B60L3/0023; B60L3/0061; B60L7/00; B60L7/02; B60L7/04; B60L7/10; B60L7/12; B60L7/22; B60L7/24; B60L7/26; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/40; B60L2220/44; B60L2240/00; B60L2240/10; B60L2240/12; B60L2240/40; B60L2240/42; B60L2240/421; B60L2240/423; B60L2240/425; B60L2240/48; B60L2240/486; B60L2260/00; B60L2260/20; B60L2260/28; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/72
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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |