Patent US1615680A successfully refreshed from Google Patents.
Patent US1285491A successfully refreshed from Google Patents.
US1285491A
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Apparatus for purifying water.
Assignee: Individual
•
Filing: 1915-03-26
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Granted: 1918-11-19
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Expires: 1935-03-26
Abstract
No abstract record available.
Inventors
- 👤 Charles F Wallace
- 👤 Martin F Tiernan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:25
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132; B; B01; B01F; B01F35/00; B01F35/80; B01F35/82; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7797
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) | 1921-11-18 | 1922-05-20 | 1922-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-11-18 | 1926-05-20 | 1926-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-11-18 | 1930-05-20 | 1930-11-19 | $7700.00 | Window Closed / Lapsed |