Patents by Inventor David J. Hutchings

David J. Hutchings has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the non-destructive inspection of surface defects
    Patent number: 4641518
    Abstract: In a process for the non-destructive inspection of surface defects, initially a solution with one or more dyes substantially having no emission under UV-light are applied and excess solution is removed after the dye has penetrated the surface defects, the surface is then covered with a developer leaving behind an absorbent coating with a high-contrast in daylight and which exclusively has one or more optical brighteners in a proportion between 0.02 and 2.0% by weight. The coating absorbs the dye from the surface defects, which appear as black traces on the coating under UV-light.
    Type: Grant
    Filed: July 25, 1985
    Date of Patent: February 10, 1987
    Assignee: Brent Chemicals International PLC
    Inventor: David J. Hutchings