Patents by Inventor Ralph W. Makinen

Ralph W. Makinen 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).

  • Vaporization method to enhance sterilant penetration
    Patent number: 4744951
    Abstract: A process for concentrating hydrogen peroxide from a relatively dilute solution of hydrogen peroxide and water and supplying the concentrated hydrogen peroxide in vapor form to a sterilization chamber. The process includes vaporizing a major portion of the water from the solution and removing the water vapor thereby produced before injecting the concentrated hydrogen peroxide vapor into the sterilizing chamber.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: May 17, 1988
    Assignee: American Sterilizer Company
    Inventors: Arthur L. Cummings, Jack H. Young, Ralph W. Makinen
  • Process for the continuous preparation of sterile, depyrogenated solutions
    Patent number: 4648978
    Abstract: A process for sterilizing and depyrogenating a pretreated solution, such as water, by adding an oxidant selected from the group consisting of hydrogen peroxide and ozone and heating the solution and the oxidant to a temperature sufficient to sterilize and depyrogenate the solution for a period of time, preferably less than 5 minutes. The oxidant is thereafter removed and the sterilized, depyrogenated solution is cooled for dispensing.
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: March 10, 1987
    Assignee: American Sterilizer Company
    Inventors: Ralph W. Makinen, James R. Rickloff