Patent US428671A successfully refreshed from Google Patents.
US428671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: —
•
Granted: 1890-05-27
•
Expires: 1907-05-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:52
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/18; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6089; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/86928; Y10T137/87016; Y10T137/87265; Y10T137/87515
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) | 1893-05-26 | 1893-11-25 | 1894-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-05-26 | 1897-11-25 | 1898-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-05-27 | 1901-11-26 | 1902-05-28 | $7700.00 | Window Closed / Lapsed |