Patent US369669A successfully refreshed from Google Patents.
Patent US41035A successfully refreshed from Google Patents.
US41035A
Expired / Lapsed
US
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Improvement in piston-valves for
Assignee: —
•
Filing: —
•
Granted: 1863-12-22
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Expires: 1880-12-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
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) | 1866-12-21 | 1867-06-22 | 1867-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1870-12-21 | 1871-06-22 | 1871-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1874-12-21 | 1875-06-22 | 1875-12-22 | $7700.00 | Window Closed / Lapsed |