Patent US3057092A successfully refreshed from Google Patents.
US3057092A
Expired / Lapsed
US
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Valve operating unit for a leveling system
Assignee: GURRIES Manufacturing CO
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Filing: 1961-01-09
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Granted: 1962-10-09
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Expires: 1981-01-09
Abstract
No abstract record available.
Inventors
- 👤 Curlett John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:43
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844; Y; Y10; Y10S; Y10S37/00; Y10S37/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2295519A
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CH240181A
Cited
US2567107A
Cited
US2792651A
Cited
GB821225A
Cited
US2830518A
Cited
US2913878A
Cited
DE1086934B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |