US3775310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous ion exchange
Assignee: —
•
Filing: 1971-03-12
•
Granted: 1973-11-27
•
Expires: 1991-03-12
Abstract
Abstract IN A CONTINUOUS COUNTERCURRENT ADSORPTION APPARATUS, MIXED ADSORBENTS LEAVING THE ADSORPTION UNIT ARE SEPARATED, WHERE NECESSARY, IN A SEPARATION UNIT AND FED TO APPROPRIATE REGENERATION UNITS. CONTINUOUS FLOW OF PRODUCT IS ACCOMPLISHED BY UTILIZING THE LIQUID MEDIUM IN A MIXING AND/OR PULSING TANK DURING THE RESIN REPLACEMENT INTERVALS.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:37
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/04
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |