US3219409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of iodine from aqueous solutions
Assignee: Dow Chemical Co
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Filing: 1962-02-05
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Granted: 1965-11-23
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Expires: 1982-02-05
Abstract
No abstract record available.
Inventors
- 👤 Delman R Asher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:33
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/13; C01B7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
METHOD FOR REMOVING ELEMENTAL IODINE FROM AN AQUEOUS SOLUTION THEREOF BY FEEDING SAID SOLUTION TO A BED OF POLYMERIC VINYLARYL RESIN BEADS, CROSSLINKED WITH 0.1 TO 8 MOLE PERCENT OF A DIAKENYL CROSSLINKING AGENT, SELECTED FROMTHE GROUP CONSISTING OF SUCH RESIN BEADS PER SE, THOSE WHICH ARE SURFACE SULFONATED TO AN ION EXCHANGE CAPACITY OF CA. 0.001 TO 0.1 MILLEQUIVALENT OF HYDROGEN PER GRAM OF DRY RESIN AND THOSE WHICH ARE SURFACE WETTED WITH AQUEOUS WETTING AGENT, SWOLLEN TO THE GEL STATE BY EQUILIBRATION WITH TETRAHYDRONAPHTHALENE, WHEREBY ELEMENTAL IODINE IS SORBED BY SAID TETRAHYDRONAPHTHALENE-SWOLLEN RESIN BEADS AND REMOVING THE SORBED IODINE THEREFROM.
Claim 2
Dependent Claim
102 words
METHOD FOR REMOVING ELEMENTAL IODINE FROM AN AQUEOUS SOLUTION THEREOF BY FEEDING SAID SOLUTION TO A BED OF POLYMERIC VINYLARYL RESIN BEADS, CROSSLINKED WITH 0.1 TO 8 MOLE PERCENT OF A DIAKENYL CROSSLINKING AGENT, SELECTED FROMTHE GROUP CONSISTING OF SUCH RESIN BEADS PER SE, THOSE WHICH ARE SURFACE SULFONATED TO AN ION EXCHANGE CAPACITY OF CA. 0.001 TO 0.1 MILLEQUIVALENT OF HYDROGEN PER GRAM OF DRY RESIN AND THOSE WHICH ARE SURFACE WETTED WITH AQUEOUS WETTING AGENT, SWOLLEN TO THE GEL STATE BY EQUILIBRATION WITH TETRAHYDRONAPHTHALENE, WHEREBY ELEMENTAL IODINE IS SORBED BY SAID TETRAHYDRONAPHTHALENE-SWOLLEN RESIN BEADS AND REMOVING THE SORBED IODINE THEREFROM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |