US4622176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing radioactive liquid wastes containing radioactive ruthenium
Assignee: Japan Atomic Energy Agency
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Filing: 1984-12-10
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Granted: 1986-11-11
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Expires: 2004-12-10
Abstract
Abstract A method of processing radioactive liquid wastes containing radioactive ruthenium by passing said wastes through a column packed with an adsorbent comprising a mixture of activated carbon with zinc and palladium powders is herein disclosed.
Inventors
- 👤 Ryozo Motoki
- 👤 Shoji Motoishi
- 👤 Mishiroku Izumo
- 👤 Katsuyuki Onoma
- 👤 Toshikazu Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:19
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
40 words
A method of processing radioactive liquid wastes containing radioactive ruthenium by passing said wastes having pH of about 2 to about 12 through a column packed with an adsorbent comprising a 1:1:0.01 mixture of activated carbon, zinc and palladium powders.
Claim 2
Independent Claim
40 words
A method of processing radioactive liquid wastes containing radioactive ruthenium by passing said wastes having pH of about 2 to about 12 through a column packed with an adsorbent comprising a 1:1:0.01 mixture of activated carbon, zinc and palladium powders.
Claim 3
Dependent Claim
30 words
A method according to claim 1 which further includes the step of regenerating a deactivated adsorbent by passing aqueous nitric acid or water through the column containing such deactivated adsorbent.
References Cited (Backward Citations)
US3694370A
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US3848048A
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US4116863A
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US4178270A
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US4277565A
Cited
US4282112A
Cited
US4331551A
Cited
JPS5750698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |