US2544543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multispeed transmission
Assignee: Wright Aeronautical Corp
•
Filing: 1949-10-01
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Granted: 1951-03-06
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Expires: 1969-10-01
Abstract
No abstract record available.
Inventors
- 👤 Francis W Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:38
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; F16H; F16H61/00; F16H61/02; F16H61/0293; F16H2716/00; F16H2716/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1791393A
Cited
US1924723A
Cited
US2022058A
Cited
US2099675A
Cited
US2263159A
Cited
US2301072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |