US861028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of filtration and water-supply.
Assignee: Individual
•
Filing: 1907-05-20
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Granted: 1907-07-23
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Expires: 1927-05-20
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand Grote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:03
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/02; E02B3/023
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) | 1910-07-22 | 1911-01-21 | 1911-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-07-22 | 1915-01-21 | 1915-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-07-22 | 1919-01-21 | 1919-07-23 | $7700.00 | Window Closed / Lapsed |