Patents by Inventor Donald H. Krasner

Donald H. Krasner 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).

  • Method for improvement of polybutylene pipe strength
    Patent number: 5082613
    Abstract: A process is disclosed for the formation of polybutylene pipes having improved mechanical properties, by reduction in the rate of cooling of the extrudate used to form the pipe sections. Preferably, the ratio of the cooling bath residence time in minutes divided by the cooling water temperature in degrees Fahrenheit is selected to be in the range of from about 0.004 to about 0.010.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: January 21, 1992
    Assignee: Shell Oil Company
    Inventors: Mark L. Kasakevich, Donald H. Krasner, Jerry W. Secrist, Roland O. Meuhlner