Patent US2712918A successfully refreshed from Google Patents.
US2712918A
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US
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Discharge gate syphon
Assignee: Individual
•
Filing: 1951-09-04
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Granted: 1955-07-12
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Expires: 1971-09-04
Abstract
No abstract record available.
Inventors
- 👤 Simpson De Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:07
CPC Classifications
E; E02; E02B; E02B13/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842; Y10T137/2911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US833303A
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US868863A
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US894240A
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US925880A
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US962624A
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US1161997A
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US1192141A
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US2272655A
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US2393867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |