Patents by Inventor Brian C. Johnston

Brian C. Johnston 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).

  • Controlling the dissolution of dissolvable polymer components in plural component fibers
    Patent number: 6861142
    Abstract: The dissolution of dissolvable components in plural component polymer fibers is achieved by providing a polymer fiber including at least two sections, where at least one fiber section includes a dissolvable component. The rate at which at least part of the fiber dissolves is controlled by at least one of a fiber section having a non-round cross-sectional geometry, and at least two fiber sections including two different dissolvable components. In an exemplary embodiment, island-in-the-sea fibers are formed with non-round and elongated cross-sectional geometries. In another embodiment, sheath-core fibers are formed in which the sheath and core include different dissolvable components.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: March 1, 2005
    Assignee: Hills, Inc.
    Inventors: Arnold E. Wilkie, Ben F. Shuler, Tony Owen, Brian C. Johnston