Patent US206228A successfully refreshed from Google Patents.
US206228A
Expired / Lapsed
US
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Improvement in locking valves
Assignee: —
•
Filing: —
•
Granted: 1878-07-23
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Expires: 1895-07-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:53
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/10; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/554; Y10T70/5562; Y10T70/5566; Y10T70/5611; Y10T70/5615; Y10T70/5619; Y10T70/5624; Y10T70/5628; Y10T70/5637; Y10T70/5757; Y10T70/5765; Y10T70/577; Y10T70/5774; Y10T70/5779; Y10T70/5854; Y10T70/5867
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) | 1881-07-22 | 1882-01-21 | 1882-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1885-07-22 | 1886-01-21 | 1886-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1889-07-22 | 1890-01-21 | 1890-07-23 | $7700.00 | Window Closed / Lapsed |