US3679595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of concentrating radioactive waste
Assignee: Siemens AG
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Filing: 1969-06-19
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Granted: 1972-07-25
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Expires: 1989-06-19
Abstract
Abstract A METHOD OF CONCENTRATING AQUEOUS SOLUTONS AND SUSPENSIONS OF RADIOACTIVE WASTE BY THICKENING AND DRYING PROCESSES. THE METHOD IS CHARACTERIZED IN THAT THE CONCENTRATE IS DRIED ON HEATED ROLLERS, WHEREBY A POLYELECTROLYTE IS ADDED, IN A KNOWN MANNER, FOR THE PURPOSE OF ADJUSTING AN APPROPRIATE VISCOSITY. BONE GLUE IS ADDED, IN ORDER TO PREVENT FORMATION OF DUST AND AS AN EMBEDDING MASS. THE ROLLER PRODUCT IS SUBSEQUENTLY COMPRESSED INTO SOLID BODIES.
Inventors
- 👤 Walter Dollgast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:30
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/08; G21F9/16; G21F9/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |