US3332744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiometric method for plant stream control in potash and phosphate recovery processes
Assignee: E A DEVELOPMENT Inc
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Filing: 1963-09-03
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Granted: 1967-07-25
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Jesse F Henderson
- 👤 Fred L Smith
- 👤 John K Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:33
CPC Classifications
G; G01; G01N; G01N23/00; G01T; G01T7/00; G01T7/02; G01T7/04; G21; G21H; G21H5/00; G21H5/02; G01N2223/00; G01N2223/01; G01N2223/20; G01N2223/202; G01N2223/205; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T436/00; Y10T436/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD OF CONTROLLING A PLANT STREAM IN A POTASH RECOVERY PROCESS IN WHICH PLANT STREAM THE POTASH INCLUDES A FIXED PERCENTAGE OF NATURALLY OCCURRING GAMMA EMITTING K**40 BASED ON THE TOTAL POTASSIUM PRESENT, SAID METHOD COMPRISING THE STEPS OF MAKING UP A PLURALITY OF SAMPLES HAVING KNOWN CONCENTRATIONS OF TOTAL POTASSIUM CORRESPONDING TO THE CONCENTRATION RANGE PRESELECTED FOR SAID PLANT STREAM, DETERMINING THE TOTAL POTASSIUM INSAID SAMPLES BY CHEMICAL MEANS, OBTAINING BY RADIOMETRIC MEANS THE GAMMA RAY COUNT PER UNIT TIME FOR K**40 IN SAID SAMPLES, CORRELATING THE CHEMICAL AND RADIOMETRIC DATA SO OBTAINED, THEREAFTER CONTROLLING SAID PLANT STREAM FOR A PRESELECTED VALUE OF SAID TOTAL PER UNIT TIME BY MAKING CONTINUOUS DETERMINATIONS DIRECTLY ON SAID PLANT STREAM OF THE CONCENTRATION OF GAMMA EMITTING K**40 THEREIN PER UNIT TIME BY RADIOMETRIC MEANS AND MAINTAINING THE CONCENTRATION OF SAID GAMMA EMITTING K**40 IN SAID PLANT STREAM AT THE CORRELATED VALUE CORRESPONDING TO SAID PRESELECTED VALUE OF TOTAL POTASSIUM.
Claim 2
Independent Claim
158 words
A METHOD OF CONTROLLING A PLANT STREAM IN A POTASH RECOVERY PROCESS IN WHICH PLANT STREAM THE POTASH INCLUDES A FIXED PERCENTAGE OF NATURALLY OCCURRING GAMMA EMITTING K**40 BASED ON THE TOTAL POTASSIUM PRESENT, SAID METHOD COMPRISING THE STEPS OF MAKING UP A PLURALITY OF SAMPLES HAVING KNOWN CONCENTRATIONS OF TOTAL POTASSIUM CORRESPONDING TO THE CONCENTRATION RANGE PRESELECTED FOR SAID PLANT STREAM, DETERMINING THE TOTAL POTASSIUM INSAID SAMPLES BY CHEMICAL MEANS, OBTAINING BY RADIOMETRIC MEANS THE GAMMA RAY COUNT PER UNIT TIME FOR K**40 IN SAID SAMPLES, CORRELATING THE CHEMICAL AND RADIOMETRIC DATA SO OBTAINED, THEREAFTER CONTROLLING SAID PLANT STREAM FOR A PRESELECTED VALUE OF SAID TOTAL PER UNIT TIME BY MAKING CONTINUOUS DETERMINATIONS DIRECTLY ON SAID PLANT STREAM OF THE CONCENTRATION OF GAMMA EMITTING K**40 THEREIN PER UNIT TIME BY RADIOMETRIC MEANS AND MAINTAINING THE CONCENTRATION OF SAID GAMMA EMITTING K**40 IN SAID PLANT STREAM AT THE CORRELATED VALUE CORRESPONDING TO SAID PRESELECTED VALUE OF TOTAL POTASSIUM.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |