Patent US2538933A successfully refreshed from Google Patents.
US2538933A
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US
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Reversing and direct drive mechanism for a pair of shafts
Assignee: KNOEDLER MANUFACTURERS Inc
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Filing: 1949-07-28
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Granted: 1951-01-23
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Expires: 1969-07-28
Abstract
No abstract record available.
Inventors
- 👤 Robert L Coan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:17
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/02; F16H3/08; F16H3/14; F16H3/145; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19279; Y10T74/19377; Y10T74/19414; Y10T74/19484; Y10T74/19498
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US424699A
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US1431642A
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US1394373A
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US1525207A
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US1659820A
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FR622587A
Cited
US1984354A
Cited
US2314549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |