Patent US523501A successfully refreshed from Google Patents.
US523501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: —
•
Granted: 1894-07-24
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Expires: 1911-07-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:51
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; Y; Y10; Y10S; Y10S261/00; Y10S261/07
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) | 1897-07-23 | 1898-01-22 | 1898-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1901-07-24 | 1902-01-23 | 1902-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1905-07-24 | 1906-01-23 | 1906-07-25 | $7700.00 | Window Closed / Lapsed |