Patents by Inventor Dolan R. Johnson

Dolan R. Johnson 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).

  • Multilayer paperboard packaging structure including polyolefin/polyamide blend layer
    Patent number: 6582808
    Abstract: A packaging laminate for a container which enables a blend monolayer to be effectively extrusion coated onto the paperboard substrate as the product contact layer without the need for tie layers or multilayer co-extrusion equipment. The blend monolayer has superior oxygen transmission resistance and has excellent pinhole resistance compared to straight polyethylene monolayer. The product contact layer consists of a blend of a polyolefin polymer, a polyamide, and a compatibilizer in a preferred embodiment. The monolayer blend is a low cost alternative to multilayer structures.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: June 24, 2003
    Assignee: International Paper Company
    Inventors: Gregory J. Castle, Dolan R. Johnson, Keith S. Shih, A. Craig Bushman
  • Multilayer paperboard packaging structure including polyolefin/polyamide blend layer
    Publication number: 20020051873
    Abstract: A packaging laminate for a container which enables a blend monolayer to be effectively extrusion coated onto the paperboard substrate as the product contact layer without the need for tie layers or multilayer co-extrusion equipment. The blend monolayer has superior oxygen transmission resistance and has excellent pinhole resistance compared to straight polyethylene monolayer. The product contact layer consists of a blend of a polyolefin polymer, a polyamide, and a compatibilizer in a preferred embodiment. The monolayer blend is a low cost alternative to multilayer structures.
    Type: Application
    Filed: August 1, 2001
    Publication date: May 2, 2002
    Inventors: Gregory J. Castle, Dolan R. Johnson, Keith S. Shih, A. Craig Bushman