US3334050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic carbonaceous matrix with radioisotope dispersed therein
Assignee: 3M Co
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Filing: 1964-08-24
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Granted: 1967-08-01
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Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 Ivan M Grotenhuis
- 👤 Carroll J Halva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:20
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04; A; A61; A61N; A61N5/00; A61N5/10; A61N5/1001; A61N2005/1019
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
35 words
A FIRED RADIOACTIVE PARTICLE CONSISTING ESSENTIALLY A A SOLID, WATER-INSOLUBLE ESSENTIALLY ORGANIC CARBONACEOUS MATRIX HAVING A RADIOISOTOPE DISPERSED THEREIN BY ION EXCHANGE AND PERMANENTLY STUCTURALLY BONDED WITHIN SAID MATRIX BY CHEMICAL BONDING AND PHYSICAL ENTRAPMENT.
Claim 2
Dependent Claim
35 words
A FIRED RADIOACTIVE PARTICLE CONSISTING ESSENTIALLY A A SOLID, WATER-INSOLUBLE ESSENTIALLY ORGANIC CARBONACEOUS MATRIX HAVING A RADIOISOTOPE DISPERSED THEREIN BY ION EXCHANGE AND PERMANENTLY STUCTURALLY BONDED WITHIN SAID MATRIX BY CHEMICAL BONDING AND PHYSICAL ENTRAPMENT.
Claim 3
Dependent Claim
112 words
A PROCESS FOR THE PRODUCTION OF RADIOACTIVE SOURCES WHICH COMPRISES THE STEPS OF CONTACTING A SOLUTION CONTAINING RADIOACTIVE IONS WITH AN ORGANIC ION EXCHANGE RESIN CAPABLE OF EXCHANGING THE RADIOACTIVE IONS IN SAID SOLUTION, FOR A PERIOD OF TIME SUFFICIENT TO BRING ABOUT SIGNIFICANT ION EXCHANGE, REMOVING SAID RESIN FROM SAID SOLUTION AND HEAT-TREATING THE RESIN CONTAINING THE RADIOACTIVE IONS AT A DEHYDRATING TEMPERATURE UP TO ABOUT 450*C. AND BELOW THE TEMPERATURE OF COMPLETE DEGRADATION OF SAID RESIN TO SHRINK AND DEHYDRATE THE RESIN AND CONVERT THE RESIN TO AN ESSENTIALLY ORGANIC, CARBONACEOUS, NON-ION EXCHANGING FORM IN WHICH THE SAID RADIOACTIVE IONS ARE PERMANENTLY STRUCTURALLY BONDED BY CHEMICAL BONDING AND PHYSICAL ENTRAPMENT.
Claim 4
Dependent Claim
112 words
A PROCESS FOR THE PRODUCTION OF RADIOACTIVE SOURCES WHICH COMPRISES THE STEPS OF CONTACTING A SOLUTION CONTAINING RADIOACTIVE IONS WITH AN ORGANIC ION EXCHANGE RESIN CAPABLE OF EXCHANGING THE RADIOACTIVE IONS IN SAID SOLUTION, FOR A PERIOD OF TIME SUFFICIENT TO BRING ABOUT SIGNIFICANT ION EXCHANGE, REMOVING SAID RESIN FROM SAID SOLUTION AND HEAT-TREATING THE RESIN CONTAINING THE RADIOACTIVE IONS AT A DEHYDRATING TEMPERATURE UP TO ABOUT 450*C. AND BELOW THE TEMPERATURE OF COMPLETE DEGRADATION OF SAID RESIN TO SHRINK AND DEHYDRATE THE RESIN AND CONVERT THE RESIN TO AN ESSENTIALLY ORGANIC, CARBONACEOUS, NON-ION EXCHANGING FORM IN WHICH THE SAID RADIOACTIVE IONS ARE PERMANENTLY STRUCTURALLY BONDED BY CHEMICAL BONDING AND PHYSICAL ENTRAPMENT.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |