Patent US72241A successfully refreshed from Google Patents.
US72241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isaac p
Assignee: —
•
Filing: —
•
Granted: 1867-12-17
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Expires: 1884-12-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:16
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/30; B01D1/305; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04
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) | 1870-12-16 | 1871-06-17 | 1871-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1874-12-16 | 1875-06-17 | 1875-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1878-12-16 | 1879-06-17 | 1879-12-17 | $7700.00 | Window Closed / Lapsed |