Patent DE3242449A1 successfully refreshed from Google Patents.
US2661596A
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US
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Field controlled hydraulic device
Assignee: WEFCO Inc
•
Filing: 1950-01-28
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Granted: 1953-12-08
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Expires: 1970-01-28
Abstract
No abstract record available.
Inventors
- 👤 Willis M Winslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:42
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/44; H01F1/447; C; C10; C10M; C10M171/00; C10M171/001; F; F15; F15B; F15B9/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/21; Y10T74/2142; Y10T74/2144; Y10T74/2148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE485592A
Cited
GB190817936A
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GB239475A
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US1687286A
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US1952806A
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US1890041A
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US2398421A
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US2417850A
Cited
US2505049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |