Patents by Inventor Marcel Delzant

Marcel Delzant 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).

  • Gas-filled glass beads and method of making
    Patent number: 4547233
    Abstract: A method of producing gas filled hollow glass beads comprises the steps of:i. manufacturing hollow glass beads having an alkali content of at least 20% calculated as weight per cent of oxide in the bead,ii. exposing the beads to an acidic treatment medium, for example HCl, HNO.sub.3, H.sub.2 SO.sub.4, SO.sub.2, SO.sub.3, to reduce the alkali content of the beads to not more than 15%, andiii. causing gas to diffuse into the beads.
    Type: Grant
    Filed: May 9, 1984
    Date of Patent: October 15, 1985
    Assignee: Glaverbel
    Inventor: Marcel Delzant
  • Modifying glass bead surfaces
    Patent number: 4542066
    Abstract: A method of modifying the surface of hollow glass beads including the step of treating the beads with a solution containing at least one of an organic acid selected from beta-hydroxy acids, oxalic acid and ethylene diamine tetraacetic acid, and a salt of said organic acid.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: September 17, 1985
    Assignee: Glaverbel
    Inventor: Marcel Delzant