Patents by Inventor Norman E. King

Norman E. King 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).

  • Methods of producing oriented high density polyethylene
    Patent number: 4183893
    Abstract: In a method of producing uniaxially oriented polymer material, particularly a uniaxially oriented film, from a high density polyethylene, in which the material is put under tension and is drawn from a transverse heated portion with a draw ratio of 5:1 or higher (preferably 7:1 to 20:1), the drawing temperature is selected to be between 80.degree. C. and 110.degree. C., and preferably below 105.degree. C., whereby excellent gas barrier characteristics are obtained in the drawn material.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: January 15, 1980
    Assignee: Metal Box Limited
    Inventors: Michael C. Eastwood, Norman E. King