US3859179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibration source emitting high energy beta particles
Assignee: United States Atomic Energy Commission
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Filing: 1974-04-15
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Granted: 1975-01-07
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Expires: 1994-04-15
Abstract
Abstract A radiation source emitting high energy beta particles which is useful for film badge calibration is prepared by simultaneously electrodepositing nickel and ruthenium-106 onto a stainless steel disc, said ruthenium-106 being carried by natural ruthenium, washing the disc and electrodepositing nickel on the disc.
Inventors
- 👤 Bruce A Staples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:07
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04; Y; Y10; Y10S; Y10S205/00; Y10S205/917; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12875; Y10T428/12937
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
A METHOD OF PREPARING A CALIBRATION SOURCE WHICH EMITS HIGH ENERGY BETA PARTICLES, COMPRISING SIMULTANEOUSLY ELECTRODEPOSITING NICKEL AND RUTHENIUM-106 ONTO A STAINLESS STEEL DISC, SAID RUTHENIUM-106 BEING CARRIED BY NATURAL RUTHENIUM, WASHING THE DISC WITH WATER, AND IMMEDIATELY ELECTROPLATING THE DISC WITH NICKEL.
Claim 2
Independent Claim
43 words
A METHOD OF PREPARING A CALIBRATION SOURCE WHICH EMITS HIGH ENERGY BETA PARTICLES, COMPRISING SIMULTANEOUSLY ELECTRODEPOSITING NICKEL AND RUTHENIUM-106 ONTO A STAINLESS STEEL DISC, SAID RUTHENIUM-106 BEING CARRIED BY NATURAL RUTHENIUM, WASHING THE DISC WITH WATER, AND IMMEDIATELY ELECTROPLATING THE DISC WITH NICKEL.
Claim 3
Independent Claim
150 words
A METHOD OF PREPARING A RUTHENIUM-106 FILM BADGE CALIBRATION SOURCE COMPRISING: A. PREPARING AN ELECTRODE, OSITION CELL CONSISTING OF A STAINLESS STEEL AN ELECTRODE, A ROTATING PLANTIUM DISC DISPOSED ONE CENTIMETER FROM THE CATHODE AS ANODE, AND CONTAINING AN ELECTROLYTE SOLUTION CONSISTING OF 1.25 M NICKEL SULFATE-0.21 M NICKEL CHLORIDE-0.66 M BORIC ACID AND INCLUDING 0.8 MG RUTHENIUM CARRIER CONTAINING RUTHENIUM-106 B. OPERATING THE ELECTRODEPOSITION CELL AT A CURRENT DENSITY OF 3 MA/CM2 FOR A TIME SUFFICIENT TO DEPOSIT 75 PERCENT OF THE RUTHENIUM-106 ACTIVITY ON THE STAINLESS STEEL DISC; C. IMMEDIATELY REMOVING THE SOLUTION FROM THE CELL; D. RINSING THE CELL INCLUDING THE CATHODE WITH WATER; E. ADDING A NICKEL CHLORIDE-NICKEL SULFATE ELECTROLYTE SOLUTION TO THE CELL; AND F. OPERATING THE ELECTRODEPOSITION CELL AT A CURRENT DENSITY OF 3 MA/CM2 FOR 20 MINUTES TO SEAL THE RUTHENIUM-106 ACTIVITY WITHIN THE CALIBRATION SOURCE BY ELECTROPLATING A NICKEL COATING THEREON .
Claim 4
Independent Claim
150 words
A METHOD OF PREPARING A RUTHENIUM-106 FILM BADGE CALIBRATION SOURCE COMPRISING: A. PREPARING AN ELECTRODE, OSITION CELL CONSISTING OF A STAINLESS STEEL AN ELECTRODE, A ROTATING PLANTIUM DISC DISPOSED ONE CENTIMETER FROM THE CATHODE AS ANODE, AND CONTAINING AN ELECTROLYTE SOLUTION CONSISTING OF 1.25 M NICKEL SULFATE-0.21 M NICKEL CHLORIDE-0.66 M BORIC ACID AND INCLUDING 0.8 MG RUTHENIUM CARRIER CONTAINING RUTHENIUM-106 B. OPERATING THE ELECTRODEPOSITION CELL AT A CURRENT DENSITY OF 3 MA/CM2 FOR A TIME SUFFICIENT TO DEPOSIT 75 PERCENT OF THE RUTHENIUM-106 ACTIVITY ON THE STAINLESS STEEL DISC; C. IMMEDIATELY REMOVING THE SOLUTION FROM THE CELL; D. RINSING THE CELL INCLUDING THE CATHODE WITH WATER; E. ADDING A NICKEL CHLORIDE-NICKEL SULFATE ELECTROLYTE SOLUTION TO THE CELL; AND F. OPERATING THE ELECTRODEPOSITION CELL AT A CURRENT DENSITY OF 3 MA/CM2 FOR 20 MINUTES TO SEAL THE RUTHENIUM-106 ACTIVITY WITHIN THE CALIBRATION SOURCE BY ELECTROPLATING A NICKEL COATING THEREON .
Claim 5
Dependent Claim
65 words
A METHOD ACCORDING TO CLAIM 2 WHEREIN THE SOURCE IS REMOVED FROM THE CELL, COVERED FOR ONE MINUTE WITH 1 ML OF 10% HN03-2% HF AT 100*F, WASHED WITH WATER, RETURNED TO THE CELL WHICH WAS FILLED WITH PLATING SOLUTION, AND PLATED WITH NICKEL USING A PLATINUM ANODE, 1 CM IN DIAMETER, ABOVE AN AREA ON THE SOURCE ONTO WHICH NICKEL DID NOT ORIGINALLY PLATE.
References Cited (Backward Citations)
US3488502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |