Patent US222727A successfully refreshed from Google Patents.
US222727A
Expired / Lapsed
US
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Improvement in valves
Assignee: —
•
Filing: —
•
Granted: 1879-12-16
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Expires: 1896-12-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:27
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; Y; Y10; Y10S; Y10S137/00; Y10S137/906; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167; Y10T137/6171; Y10T137/6174
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) | 1882-12-15 | 1883-06-16 | 1883-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1886-12-15 | 1887-06-16 | 1887-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1890-12-15 | 1891-06-16 | 1891-12-16 | $7700.00 | Window Closed / Lapsed |