Patent US2484647A successfully refreshed from Google Patents.
US2484647A
Expired / Lapsed
US
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Ion exchange treatment of solutions
Assignee: Dorr Co
•
Filing: 1945-08-24
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Granted: 1949-10-11
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Expires: 1965-08-24
Abstract
No abstract record available.
Inventors
- 👤 Elliott J Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:43
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/05; B01J49/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2264402A
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US2248055A
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US2226743A
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US2267841A
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US2351648A
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US2368574A
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US2429943A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |