Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Reexamination Certificate
2009-02-24
2010-10-12
Walke, Amanda C. (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
C430S270150, C430S019000, C430S396000, C430S394000
Reexamination Certificate
active
07811741
ABSTRACT:
An image-forming medium and methods for forming and imaging the medium are provided. The disclosed medium can be strongly colored under room illumination (or deliberate UV) and can be selectively discolored at an appropriate light wavelength to form an image. In one embodiment, the image-forming medium can include a substrate (e.g., a sheet of paper), a photochromic material incorporated with the substrate, and a photo-absorbing material incorporated with the photochromic material. Exemplary methods for using the image-forming medium to make a transient image can include first forming the image-forming medium by applying a coating solution containing photochromic material to the substrate or paper. The image-forming medium can have a medium color and can then be selectively exposed to a radiation through a mask to convert the photochromic material from a colored form to a colorless form and thus to form an image having a color contrast with its background.
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Machine translation of JP 2003-255490.
European Patent Office, European Search Report, European Application No. 10154295.9; May 20, 2010, 3 pages.
Chopra Naveen
Iftime Gabriel
Kazmaier Peter M.
Morimitsu Kentaro
Norsten Tyler
MH2 Technology Law Group LLP
Walke Amanda C.
Xerox Corporation
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