Patent US6252A successfully refreshed from Google Patents.
US6252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Henry ritchie
Assignee: —
•
Filing: —
•
Granted: 1849-04-03
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Expires: 1866-04-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:45
CPC Classifications
E; E05; E05B; E05B35/00; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7514
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) | 1852-04-02 | 1852-10-02 | 1853-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1856-04-02 | 1856-10-02 | 1857-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1860-04-02 | 1860-10-02 | 1861-04-03 | $7700.00 | Window Closed / Lapsed |