Patent US550073A successfully refreshed from Google Patents.
US550073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying liquids and apparatus therefor
Assignee: —
•
Filing: —
•
Granted: 1895-11-19
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Expires: 1912-11-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:55
CPC Classifications
B; B04; B04B; B04B3/00
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) | 1898-11-18 | 1899-05-20 | 1899-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1902-11-19 | 1903-05-21 | 1903-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1906-11-19 | 1907-05-21 | 1907-11-20 | $7700.00 | Window Closed / Lapsed |