US3213016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange process
Assignee: Rohm and Haas Co
•
Filing: 1961-08-23
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Granted: 1965-10-19
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Expires: 1981-08-23
Abstract
No abstract record available.
Inventors
- 👤 Donald S Gowers
- 👤 Grinsfelder Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:47
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; B; B01; B01J; B01J47/00; B01J47/12; B01J47/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD FOR EFFECTING ION EXCHANGE COMPRISING FORCING A LIQUID TO BE TREATED GENERALLY RADIALLY THROUGH AN ANNULAR WINDING OF A MULTI-FILAMENT BUNDLE OF ION EXCHANGE FILAMENTS, THE LAPS OF THE WINDING BEING IN A DISPOSITIONAL RELATIONSHIP RESULTING FROM THE WINDING OF THE BUNDLE WHILE IN A FULLY WATER-SWOLLEN CONDITION.
Claim 2
Independent Claim
50 words
A METHOD FOR EFFECTING ION EXCHANGE COMPRISING FORCING A LIQUID TO BE TREATED GENERALLY RADIALLY THROUGH AN ANNULAR WINDING OF A MULTI-FILAMENT BUNDLE OF ION EXCHANGE FILAMENTS, THE LAPS OF THE WINDING BEING IN A DISPOSITIONAL RELATIONSHIP RESULTING FROM THE WINDING OF THE BUNDLE WHILE IN A FULLY WATER-SWOLLEN CONDITION.
References Cited (Backward Citations)
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US2758968A
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US2987191A
Cited
US2974101A
Cited
US3062738A
Cited
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Cited
US3062379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |