Patent US2535904A successfully refreshed from Google Patents.
US2535904A
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US
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Reversible speed-reduction gear for ship propulsion
Assignee: Fairfield Shipbuilding and Engineering Co Ltd
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Filing: 1948-02-19
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Granted: 1950-12-26
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Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Davis Allan William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/02; B63H23/08; Y; Y10; Y10S; Y10S74/00; Y10S74/05; Y10T; Y10T74/00; Y10T74/19; Y10T74/19009; Y10T74/19023; Y10T74/19037; Y10T74/19219; Y10T74/19377; Y10T74/19386; Y10T74/19409; Y10T74/19414; Y10T74/19484; Y10T74/19488
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE423850C
Cited
GB171030A
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US1667842A
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US1682593A
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US1987985A
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US2423820A
Cited
US2415760A
Cited
GB619866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |