US3686764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpretation method for use in x-ray diffraction and x-ray fluorescense analysis
Assignee: Individual
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Filing: 1970-04-10
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Granted: 1972-08-29
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Expires: 1990-04-10
Abstract
Abstract A simple and efficient means is provided in X-ray fluorescence and X-ray diffraction for deriving interplanar spacings and wave lengths, or characteristic elements, determined from the data by the Bragg equation. The apparatus contemplates a data background sheet and an interpretive sheet. The data on the background sheet is in the form of a plot of either an X-ray diffraction pattern or an X-ray fluorescense pattern. The interpretive sheet is a transparent sheet superimposable over the data sheet with indicia imprinted in scale thereacross.
Inventors
- 👤 William M Oesterritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/22; G01N23/223; G01N23/20; G01N23/20008; G01N2223/00; G01N2223/05; G01N2223/056; G01N2223/0566; G01N2223/07; G01N2223/076; G01N2223/10; G01N2223/101; G01N2223/1016
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
A process for identifying unknown substances from data on Xray diffraction and X-ray fluorescence spectrograms obtained by direct recording spectrometers, the data thereon being plots of spectral intensities versus reflection angles, comprising preparing a transparent interpretive sheet having indicia imprinted in scale horizontally thereacross, in the form of an arrangement of elements to correspond with the spectrogram when it is an X-ray fluorescence spectrogram, and in the form of an arrangement of interplanar spacings to correspond with the spectrogram when it is an X-ray diffrAction spectrogram, imprinting on said transparent interpretive sheet a vertical index line, making the scale of the abscissa on the interpretive sheet equal to the scale of the abscissa on the spectrogram, positioning the spectrogram in a working position, superimposing the corresponding transparent interpretive sheet over the spectrogram and aligning the index line on the interpretive sheet with an abscissa value on the spectrogram so that peaks on the data sheet will be identified by indicia on the interpretive sheet.
Claim 2
Dependent Claim
164 words
A process for identifying unknown substances from data on Xray diffraction and X-ray fluorescence spectrograms obtained by direct recording spectrometers, the data thereon being plots of spectral intensities versus reflection angles, comprising preparing a transparent interpretive sheet having indicia imprinted in scale horizontally thereacross, in the form of an arrangement of elements to correspond with the spectrogram when it is an X-ray fluorescence spectrogram, and in the form of an arrangement of interplanar spacings to correspond with the spectrogram when it is an X-ray diffrAction spectrogram, imprinting on said transparent interpretive sheet a vertical index line, making the scale of the abscissa on the interpretive sheet equal to the scale of the abscissa on the spectrogram, positioning the spectrogram in a working position, superimposing the corresponding transparent interpretive sheet over the spectrogram and aligning the index line on the interpretive sheet with an abscissa value on the spectrogram so that peaks on the data sheet will be identified by indicia on the interpretive sheet.
Claim 3
Dependent Claim
38 words
The process of claim 1 wherein the spectrogram has thereon a plot of an X-ray diffraction pattern and wherein the transparent interpretive sheet has values of interplanar spacings thereacross in alignment with reflection angles on the spectrogram sheet.
Claim 4
Dependent Claim
37 words
The process of claim 1 wherein the spectrogram has thereon a plot of an X-ray fluorescence pattern and wherein the transparent interpretive sheet has symbols of chemical elements thereacross in alignment with reflection angles on the spectrogram.
Claim 5
Dependent Claim
37 words
The process of claim 1 wherein the transparent interpretive sheet has thereupon a correction vertical index line compensating for the instrument tube peak and wherein the index line is aligned with an abscissa value on the spectrogram.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the vertical index line on the interpretive sheet is based on the interplanar spacings of a known crystal.
Claim 7
Dependent Claim
29 words
The process of claim 1 wherein the vertical index line on the interpretive sheet is based on the known wave length of the ray emitted by the target element.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |