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US3658467A
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System for total iodine retention
Assignee: United States Atomic Energy Commission
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Filing: 1969-07-28
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Granted: 1972-04-25
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Expires: 1989-07-28
Abstract
Abstract A method of absorbing and retaining air-borne inorganic iodine and organic iodine species by passing a gaseous stream containing these iodines through a filter bed of synthetic zeolite in a metal ion-exchanged form, which metal is reactive with iodine.
Inventors
- 👤 William J Maeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:04
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
The method of claim 1 wherein the synthetic zeolite is zeolite X.
Claim 2
Dependent Claim
15 words
The method of claim 2 wherein the zeolite X is in the silver ion-exchanged form.
Claim 3
Dependent Claim
59 words
The method of claim 3 wherein the zeolite X is placed in the silver ion-exchanged form by passing an aqueous solution of silver nitrate through the zeolite X suspended in water until all the zeolite is converted to the silver ion-exchanged form, washing said zeolite with water until all the excess silver nitrate is removed and drying said zeolite.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |