Patent US2232295A successfully refreshed from Google Patents.
US2232295A
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US
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Process for treating liquids
Assignee: CHARLES H LEWIS
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Filing: 1938-07-14
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Granted: 1941-02-18
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Expires: 1958-07-14
Abstract
No abstract record available.
Inventors
- 👤 Oliver M Urbain
- 👤 William R Stemen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:44
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/48; C02F1/488; B; B03; B03C; B03C1/00; B03C1/005; B03C1/01; C02F1/52
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) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |