Patent US2521299A successfully refreshed from Google Patents.
US2521299A
Expired / Lapsed
US
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Throttle control for a plurality of engines
Assignee: Individual
•
Filing: 1945-03-01
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Granted: 1950-09-05
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Expires: 1965-03-01
Abstract
No abstract record available.
Inventors
- 👤 Mallory Marion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:41
CPC Classifications
F; F02; F02D; F02D25/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1171; Y10T137/7722; Y10T137/7748; Y10T137/7752
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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |