US2557765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control mechanism
Assignee: General Electric Co
•
Filing: 1949-02-23
•
Granted: 1951-06-19
•
Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 Alastair D Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:59
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/16; H02P25/18; H02P25/182; A; A47; A47J; A47J43/00; A47J43/04; A47J43/07; A47J43/08; A47J43/082; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/935; Y10S388/936
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2099050A
Cited
US2242456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |