Resources Contact Us Home
Poon; Stephen S. C.
Harlow, GB2
No. of patents:

Patent Number Title Of Patent Date Issued
4981775 Photothermographic elements January 1, 1991
A photothermographic element comprising a support bearing an image forming system comprising:(a) a photosensitive silver halide(b) an organic silver compound(c) a polymer binder and(d) a reducing agent for the organic silver compound, characterized in that the reducing agent comprises a redo
4594312 Heat bleachable dye systems June 10, 1986
Photothermographic elements containing heat bleachable acutance/antihalation dyes and thermographic elements employing heat bleachable dyes of the formula: ##STR1## in which: n is 2, 3, 4 or 5,at least one of R.sup.1 to R.sup.4 represent hydrogen and the remainder of R.sup.1 to R
4581323 Photothermographic element having topcoat bleachable antihalation layer April 8, 1986
A photothermographic element comprising a reflective base having coated thereon one or more layers constituting a photothermographic imaging medium in which a bleachable antihalation medium is coated over said photothermographic imaging medium, the components of the antihalation medi
4548896 Dye-bleach materials and process October 22, 1985
An imagewise bleachable composition is described comprising a dye in reactive association with a mesoionic compound. The composition may be bleached by radiation at wavelengths between 200 and 1000 nm.

  Recently Added Patents
Determining system for localization methods combination
Circuitry for measuring and compensating phase and amplitude differences in NDT/NDI operation
System and method of improving audio signals for the hearing impaired
Process and intermediates for preparing lapatinib
Photographic printing paper and method of making same
Complete context search system
Dynamically reconfigurable systolic array accelorators
  Randomly Featured Patents
SMA actuator
Liquid jet recording head and recording apparatus having same
Memory system wherein individual bits may be updated
Water heater with shut-off valve
Crosstalk suppression technique
Cappuccino making adapter for an espresso machine
Universal joint tool
Azetidinone derivatives, a process for their preparation and their use as intermediates in the preparation of carbapenem antibiotics
Certain imidazoquinoxalines: a new class of GABA brain receptor ligands
Apparatus for aggregating individuals based on association variables