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US2365221A
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Apparatus and method for conducting ionic exchange operations
Assignee: Dorr Co
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Filing: 1942-02-28
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Granted: 1944-12-19
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Expires: 1962-02-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Shafor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:29
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14; B; B01; B01J; B01J47/00; B01J47/02; B01J47/022; C02; C02F; C02F1/00; C02F1/42; G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0396; Y10T137/2931; Y10T137/3115; Y10T137/3127
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) | 1947-12-19 | 1948-06-19 | 1948-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-12-19 | 1952-06-19 | 1952-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-12-19 | 1956-06-19 | 1956-12-19 | $7700.00 | Window Closed / Lapsed |