Patents by Inventor David R. Hamblin, Jr.

David R. Hamblin, Jr. 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).

  • Aqueous pressure-sensitive adhesive composition, production method therefor and pressure-sensitive adhesive tape using the composition
    Patent number: 6646046
    Abstract: A pressure-sensitive adhesive composition comprising a water-soluble polymer A, a water-insoluble component B, a water-incompatible solvent C that dissolves the water-insoluble component B and is incompatible with water, a water-soluble plasticizer D, and water, wherein the pressure-sensitive adhesive composition in a dry state has water solubility according to Technical Association of The Pulp and Paper Industry Useful Method 213 (TAPPI UM 213). Also disclosed are a method for producing a pressure-sensitive adhesive composition according to the present invention, comprising the steps of: preliminarily preparing a true nonaqueous solution of a water-insoluble component B in a water-incompatible solvent C, and mixing the true nonaqueous solution with an aqueous solution of at least one member selected from the group consisting of a water-soluble polymer A and a water-soluble plasticizer D, and a pressure-sensitive adhesive and a pressure-sensitive adhesive tape that use the composition.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: November 11, 2003
    Assignees: Permachel, Nitto Denko Corporation
    Inventors: Svetlana I. Contrada, Koichi Nakamura, David R. Hamblin, Jr.