Patent US402386A successfully refreshed from Google Patents.
Patent US824733A successfully refreshed from Google Patents.
Patent US2269149A successfully refreshed from Google Patents.
Patent US4485808A successfully refreshed from Google Patents.
Patent US892486A successfully refreshed from Google Patents.
US892486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying water and sewage.
Assignee: Individual
•
Filing: 1908-01-11
•
Granted: 1908-07-07
•
Expires: 1928-01-11
Abstract
No abstract record available.
Inventors
- 👤 Albert Edward Woolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1911-07-07 | 1912-01-06 | 1912-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-07-07 | 1916-01-06 | 1916-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-07-07 | 1920-01-06 | 1920-07-07 | $7700.00 | Window Closed / Lapsed |