US2547236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-speed drive
Assignee: Individual
•
Filing: 1947-02-17
•
Granted: 1951-04-03
•
Expires: 1967-02-17
Abstract
No abstract record available.
Inventors
- 👤 Carl E Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:09
CPC Classifications
F; F16; F16D; F16D67/00; Y; Y10; Y10S; Y10S74/00; Y10S74/01; Y10T; Y10T74/00; Y10T74/19; Y10T74/19149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1026073A
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US1946154A
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FR679091A
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US1845332A
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US1900119A
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US2102634A
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US2037787A
Cited
US1991124A
Cited
US2170644A
Cited
US2324733A
Cited
US2372817A
Cited
US2350810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |