US3204103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beta radiation source in a ceramic carrier
Assignee: 3M Co
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Filing: 1961-10-04
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Granted: 1965-08-31
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Expires: 1981-10-04
Abstract
No abstract record available.
Inventors
- 👤 James R Johnson
- 👤 Thomas N Lahr
- 👤 Richard N Walz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:50
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/02; G21F; G21F5/00; G21F5/015; G21G4/04; G21G4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A RADIATION SOURCE COMPRISING, IN COMBINATION, A SOLID RADOISOTOPE FORMING PART OF A CERAMIC CARRIER, AND A CORROSION-RESISTANT EXTERNAL CERAMIC SHIELD THEREFORE WHICH IS SUBSTANTIALLY PERMEABLE TO THE RADIATION OF SAID ISOTONE, THE SAID RADIOISOTOPE BEING SEPARATED FROM THE SAID SHIELD BY AN OCCULUDING BARRIER LAYER WHICH IS SUBSTANTIALLY PERMEABLE TO THE RADIATION FROM THE SAID RADIOISOTOPE AND WHICH IS IMPERMEABLE TO THE SAID RADIOISOTOPE AND RADIOACTIVE DECAY PRODUCTS, THE SAID BARRIER LAYER BEING SUBSTANTIALLY NON-REACTIVE WITH THE SAID EXTERNAL SHIELD AND THE SAID RADIOIOSOTOPE AT TEMPERATURES OF THE ORDER OF THOSE AT WHICH THE SHIELD IS APPLIED, SAID SHIELD AND BARRIER BEING BONDED TOGETHER SO AS TO FORM AN INTEGRAL CONSTRUCTION.
Claim 2
Dependent Claim
112 words
A RADIATION SOURCE COMPRISING, IN COMBINATION, A SOLID RADOISOTOPE FORMING PART OF A CERAMIC CARRIER, AND A CORROSION-RESISTANT EXTERNAL CERAMIC SHIELD THEREFORE WHICH IS SUBSTANTIALLY PERMEABLE TO THE RADIATION OF SAID ISOTONE, THE SAID RADIOISOTOPE BEING SEPARATED FROM THE SAID SHIELD BY AN OCCULUDING BARRIER LAYER WHICH IS SUBSTANTIALLY PERMEABLE TO THE RADIATION FROM THE SAID RADIOISOTOPE AND WHICH IS IMPERMEABLE TO THE SAID RADIOISOTOPE AND RADIOACTIVE DECAY PRODUCTS, THE SAID BARRIER LAYER BEING SUBSTANTIALLY NON-REACTIVE WITH THE SAID EXTERNAL SHIELD AND THE SAID RADIOIOSOTOPE AT TEMPERATURES OF THE ORDER OF THOSE AT WHICH THE SHIELD IS APPLIED, SAID SHIELD AND BARRIER BEING BONDED TOGETHER SO AS TO FORM AN INTEGRAL CONSTRUCTION.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |