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US506879A
Expired / Lapsed
US
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Apparatus for the purification of sewage or other impure liquids
Assignee: —
•
Filing: —
•
Granted: 1893-10-17
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Expires: 1910-10-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:44
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18
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) | 1896-10-16 | 1897-04-17 | 1897-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-10-17 | 1901-04-18 | 1901-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-10-17 | 1905-04-18 | 1905-10-18 | $7700.00 | Window Closed / Lapsed |