Oil soluble taggants
AssigneeAltria Client Services LLC
InventorWilliam James Faenza
Life of this patent
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Abstract
A process for detecting oil or lubricant contamination in the production of an article by adding a Stokes-shifting taggant to an oil or lubricant of a machine utilized to produce the article or a component thereof, irradiating the articles produced with a first wavelength of radiation, and monitoring the articles for emission of radiation at a second wavelength. The taggant can be in the form of a composition containing a Stokes-shifting taggant, which absorbs radiation at a first wavelength and emits radiation at a second wavelength, different from said first wavelength, dissolved or dispersed in an oil or lubricant.
Claims16
A fluorescent taggant composition, comprising:
- a Stokes-shifting taggant, which absorbs infrared radiation at a first wavelength and emits infrared radiation at a second wavelength as a primary emission peak, different from the first wavelength;
- and
- an oil, a lubricant, or both an oil and a lubricant,
- wherein the taggant is an organic compound which has been complexed to cause a secondary emission peak on a negative slope of the primary emission peak.
A taggant composition, comprising:
- an oil-soluble infrared fluorescent taggant;
- and
- an oil, a lubricant, or both an oil and a lubricant,
- wherein the taggant is an organic compound which has been complexed to cause a secondary emission peak on a negative slope of a primary emission peak.
Dependencies are inferred from the claim text.