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US427447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for
Assignee: —
•
Filing: —
•
Granted: 1890-05-06
•
Expires: 1907-05-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:14
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02
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) | 1893-05-05 | 1893-11-04 | 1894-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-05-05 | 1897-11-04 | 1898-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-05-06 | 1901-11-05 | 1902-05-07 | $7700.00 | Window Closed / Lapsed |