Patents by Inventor David S. MacMillan

David S. MacMillan 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 treating coating formulations
    Patent number: 6590023
    Abstract: A method of making a coating formulation prior to its introduction onto a web to be printed by an ink jet printer. The method includes the steps of: determining the nature and amount of undesirable substances in a component of the coating formulation, adjusting the pH of the component, contacting the pH adjusted component with a first activated carbon material, filtering the thus treated component, contacting the thus treated component with a second activated carbon material, and filtering the thus treated component and combining it with other components of the coating formulation to yield a treated coating formulation having a reduced amount of the undesirable substances.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: July 8, 2003
    Assignee: Lexmark International, Inc.
    Inventor: David S. MacMillan
  • Method for treating coating formulations
    Publication number: 20010035379
    Abstract: A method of making a coating formulation prior to its introduction onto a web to be printed by an ink jet printer. The method includes the steps of: determining the nature and amount of undesirable substances in a component of the coating formulation, adjusting the pH of the component, contacting the pH adjusted component with a first activated carbon material, filtering the thus treated component, contacting the thus treated component with a second activated carbon material, and filtering the thus treated component and combining it with other components of the coating formulation to yield a treated coating formulation having a reduced amount of the undesirable substances.
    Type: Application
    Filed: March 21, 2001
    Publication date: November 1, 2001
    Inventor: David S. MacMillan