Patent US2754368A successfully refreshed from Google Patents.
US154585A
Expired / Lapsed
US
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Improvement in valves for engines
Assignee: —
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Filing: —
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Granted: 1874-09-01
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Expires: 1891-09-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:30
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/06; B62D49/065; F; F01; F01L; F01L15/00; F01L15/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/87153; Y10T137/87161
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) | 1877-08-31 | 1878-03-02 | 1878-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1881-08-31 | 1882-03-02 | 1882-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1885-08-31 | 1886-03-02 | 1886-09-01 | $7700.00 | Window Closed / Lapsed |