US2549020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic speed controller
Assignee: RTX Corp
•
Filing: 1949-02-10
•
Granted: 1951-04-17
•
Expires: 1969-02-10
Abstract
No abstract record available.
Inventors
- 👤 Seldon Mark Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:59
CPC Classifications
B; B64; B64D; B64D27/00; B64D27/02; B64D27/023; G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0615; G05D1/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1418131A
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US2414430A
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US2472181A
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US2461967A
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US2460843A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |