Porous particles with multiple markers
AssigneeEastman Kodak Company
InventorsMridula Nair, David F. Jennings, Tamara K. Jones, Joseph S. Sedita
Life of this patent
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Abstract
Polymeric porous particles have a continuous solid phase and at least two different internal pores that are isolated from each other within the continuous phase. At least one set of discrete pores contains a marker material, and some instances, each set of discrete pores contain different pores marker materials that are isolated from each other. These marker materials are detectably different from each other. The porous particles can be spherical or non-spherical and can be used in any situation where the detectably different marker materials can be evaluated.
Claims31
A porous particle comprising a polymer that provides a continuous solid phase including an external particle surface, and at least first and second discrete pores that are isolated from each other and dispersed within the continuous phase,
- and further comprising a first marker material that is present within only the volume of the first discrete pores, and a second marker material that is present within only the volume of the second discrete pores, which first and second marker materials are detectably different the porous particle having a mode particle size of at least 2 μm and up to and including 75 μm.
A porous particle comprising a polymer that provides a continuous solid phase including an external particle surface, and two or more discrete pores that are isolated from each other and dispersed within the continuous phase,
- and further comprising two or more different marker materials within only the volume of the two or more discrete pores, respectively, at least two of the two or more marker materials are detectably different from each other, and there are as many different marker materials as there are discrete pores the porous particle having a mode particle size of at least 2 μm and up to and including 75 μm.
A mixture of first and second porous particles, wherein
- the first porous particle comprises a first polymeric binder that provides a continuous solid phase including an external particle surface, and first and second discrete pores that are isolated from each other and dispersed within the continuous solid phase, the first porous particle further comprising a first marker material present within only the volume of first discrete pores, and a second marker material present within only the volume of second discrete pores, which first and second marker materials are detectably different, and
- the second porous particle comprises a second polymeric binder that provides a continuous solid phase including an external particle surface, and third and fourth discrete pores that are isolated from each other and dispersed within the continuous solid phase, the second porous particle further comprising a third marker material present within only the volume of third discrete pores, and a fourth marker material present within only fourth discrete pores comprising, which third and fourth marker materials are detectably different wherein the first and second porous particles have a mode particle size of at least 2 μm and up to and including 75 μm.
Dependencies are inferred from the claim text.