Patent US502252A successfully refreshed from Google Patents.
US502252A
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US
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Process of and apparatus for purifying water
Assignee: —
•
Filing: —
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Granted: 1893-07-25
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Expires: 1910-07-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:06
CPC Classifications
F; F22; F22D; F22D5/00; F22D5/18; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K47/00; F16K47/01; F16K47/011; F16K47/0111; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7939
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) | 1896-07-24 | 1897-01-23 | 1897-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-07-25 | 1901-01-24 | 1901-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-07-25 | 1905-01-24 | 1905-07-26 | $7700.00 | Window Closed / Lapsed |