US507774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying water
Assignee: —
•
Filing: 1892-12-31
•
Granted: 1893-10-31
•
Expires: 1912-12-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:19
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1412; B01; B01D; B01D21/00; B01D21/26; B03D1/1443; B03D1/1462; B03D1/24; B03D1/245; C; C02; C02F; C02F1/00; C02F1/24; B03D1/1487; B03D1/242
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) | 1896-10-30 | 1897-05-01 | 1897-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-10-31 | 1901-05-02 | 1901-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-10-31 | 1905-05-02 | 1905-11-01 | $7700.00 | Window Closed / Lapsed |