US2987472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for increasing and decreasing the ion content of fluids by ion transfer
Assignee: Individual
•
Filing: 1955-09-22
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Granted: 1961-06-06
•
Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 Kollsman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:12
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/12; B01D; B01D61/00; B01D61/24; B01D61/243; B01D61/28; B01D2313/00; B01D2313/24; B01D2313/243; B01D2325/00; B01D2325/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF DEIONIZING AN IONIC SOLUTION AND PRODUCING AN IONIC CONCENTRATE, WHICH COMPRISES EXPOSING THE SOLUTION TO ONE SIDE OF A MICROPOROUS ION PERMEABLE BARRIER, ONE PORTION OF WHICH IS PERMEABLE TO IONS OF ONE PLARITY AND PASSAGE RESISTANT TO IONS OF THE OPPOSITE POLARITY, AND ANOTHER PORTION OF WHICH IS PERMEABLE TO IONS OF SAID OPPOSITE POLARITY AND PASSAGE RESISTANT TO IONS OF SAID
Claim 2
Independent Claim
66 words
THE METHOD OF DEIONIZING AN IONIC SOLUTION AND PRODUCING AN IONIC CONCENTRATE, WHICH COMPRISES EXPOSING THE SOLUTION TO ONE SIDE OF A MICROPOROUS ION PERMEABLE BARRIER, ONE PORTION OF WHICH IS PERMEABLE TO IONS OF ONE PLARITY AND PASSAGE RESISTANT TO IONS OF THE OPPOSITE POLARITY, AND ANOTHER PORTION OF WHICH IS PERMEABLE TO IONS OF SAID OPPOSITE POLARITY AND PASSAGE RESISTANT TO IONS OF SAID
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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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |