US3966852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing test specimens for analysis
Assignee: Siemens AG
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Filing: 1972-10-26
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Granted: 1976-06-29
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Expires: 1992-10-26
Abstract
Abstract In preparing test specimens for analysis, especially by X-ray fluorescence, the materials to be tested are comminuted and then dissolved in molten phosphates that are molten at elevated temperatures (several hundred degrees Centigrade) but solid at room temperature, and are subsequently cast into the required specimen form.
Inventors
- 👤 Karl-Heinz Neeb
- 👤 Werner Schweighofer
- 👤 Hans-Jorg Weisse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/22; G01N23/2202; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/113332; Y10T436/114165; Y10T436/15; Y10T436/153333; Y10T436/17; Y10T436/173076; Y10T436/173845
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
The process for preparing test specimens for X-ray analysis, which process comprises mixing together a radio active sample material to be analyzed, a molten phosphate which is normally solid at room temperature and melts at a temperature above 100°, said molten phosphate being at least 50 times by weight greater than the amount of said sample and a substance which serves as an internal standard for X-ray analysis, and forming the resulting mixture into a shaped form suitable for X-ray analysis.
Claim 2
Dependent Claim
81 words
The process for preparing test specimens for X-ray analysis, which process comprises mixing together a radio active sample material to be analyzed, a molten phosphate which is normally solid at room temperature and melts at a temperature above 100°, said molten phosphate being at least 50 times by weight greater than the amount of said sample and a substance which serves as an internal standard for X-ray analysis, and forming the resulting mixture into a shaped form suitable for X-ray analysis.
Claim 3
Dependent Claim
17 words
The process of claim 1 in which said phosphate is (NH 4 ) 2 HPO 4 .
Claim 4
Dependent Claim
24 words
The process of claim 1 in which said molten phosphate is ammonium phosphate at a temperature in the range of about 350° to 450°C.
Claim 5
Dependent Claim
17 words
The process of claim 3 in which the mixture is formed at a temperature of about 150°C.
Claim 6
Dependent Claim
20 words
The process of claim 1 in which said sample is in comminuted form before being added to said molten phosphate.
Claim 7
Dependent Claim
93 words
The process for preparing test specimens for X-ray analysis, which process comprises dissolving a radioactive sample of material to be analyzed in a molten ammonium phosphate, said phosphate being at a temperature of about 350°-450°C, wherein the amount of molten phosphate is at least 50 times, by weight, greater than the amount of said sample, mixing therewith a substance which serves as an internal standard for X-ray analysis, and casting the resulting mixture consisting essentially of said dissolved sample, phosphate and internal standard substance into a water-soluble shaped form suitable for X-ray analysis.
Claim 8
Dependent Claim
93 words
The process for preparing test specimens for X-ray analysis, which process comprises dissolving a radioactive sample of material to be analyzed in a molten ammonium phosphate, said phosphate being at a temperature of about 350°-450°C, wherein the amount of molten phosphate is at least 50 times, by weight, greater than the amount of said sample, mixing therewith a substance which serves as an internal standard for X-ray analysis, and casting the resulting mixture consisting essentially of said dissolved sample, phosphate and internal standard substance into a water-soluble shaped form suitable for X-ray analysis.
References Cited (Backward Citations)
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Cited
US3265627A
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US3340201A
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US3373116A
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US3314893A
Cited
US3740241A
Cited
US3764805A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |