Patents Assigned to Perfect View Incorporated
  • Patent number: 4666859
    Abstract: A novel colorimetric reagent for the selective determination of formaldehyde in solution or in air is described. The reagent comprises at least two chemicals: rubeanic acid or a rubeanic acid derivative, and a cyano complex of a metal. Upon addition of formaldehyde, a color is formed which is quantitatively related to the number of formaldehyde molecules reacted. The chromophoric reagent can be mixed with other inactive ingredients such as stabilizers, buffers, polymers, etc. and used in solutions as a coating on a flat surface, or on beads to detect and determine formaldehyde colorimetrically. One particular application of the colorimetric reagent is in a direct reading colorimetric gas dosimeter for formaldehyde.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: May 19, 1987
    Assignee: Perfect View Incorporated
    Inventor: Amir J. Attar