Patent US275277A successfully refreshed from Google Patents.
US275277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of purifying water
Assignee: —
•
Filing: —
•
Granted: 1883-04-03
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Expires: 1900-04-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:22
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917; Y10S210/928
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) | 1886-04-02 | 1886-10-02 | 1887-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1890-04-02 | 1890-10-02 | 1891-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1894-04-02 | 1894-10-02 | 1895-04-03 | $7700.00 | Window Closed / Lapsed |