Registers – Records – Fluorescent – phosphorescent – radiation emitting
Patent
1983-04-21
1984-10-09
Pitts, Harold I.
Registers
Records
Fluorescent, phosphorescent, radiation emitting
235487, 235494, G06K 1906
Patent
active
044763824
ABSTRACT:
A scheme for encoding an article involves marking the article with a first material of at least one element, at least one compound of at least one element or a mixture located at a predetermined position on the article. The article is also marked with a second material of at least one element or a mixture thereof located at a predetermined position on the article. The first and second materials each have the property of emitting x-rays when subjected to a primary source of electromagnetic radiation of appropriate wavelength. The emission wavelength/wavelengths, and intensity/intensities for the first material are a predetermined, coded indication of the location of the second material. The emission wavelength/wavelengths and intensity/intensities of the second material are a predetermined identification or verification code for the article.
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patent: 3473027 (1969-10-01), Freeman et al.
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patent: 4146792 (1979-03-01), Stenzel et al.
Leonowich, J., et al., "Radioisotope Sources For X-ray Fluorescence Analysis", J. of Radioanalytical Chemistry, vol. 40, (1977), pp. 175 to 187.
Intex Inc.
Pitts Harold I.
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