Patent US456643A successfully refreshed from Google Patents.
US456643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine
Assignee: —
•
Filing: —
•
Granted: 1891-07-28
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Expires: 1908-07-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:17
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7937
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) | 1894-07-27 | 1895-01-26 | 1895-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-07-27 | 1899-01-26 | 1899-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-07-28 | 1903-01-27 | 1903-07-29 | $7700.00 | Window Closed / Lapsed |