Patent US1256759A successfully refreshed from Google Patents.
US1256759A
Expired / Lapsed
US
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Valve control.
Assignee: Everlasting Valve Co Inc
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Filing: 1917-03-30
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Granted: 1918-02-19
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Expires: 1937-03-30
Abstract
No abstract record available.
Inventors
- 👤 Wlie Gemmel Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:00
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/30; F16K1/304; F16K1/305; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1921-02-18 | 1921-08-20 | 1922-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-02-18 | 1925-08-20 | 1926-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-02-18 | 1929-08-20 | 1930-02-19 | $7700.00 | Window Closed / Lapsed |