Patents by Inventor Krishnaswamy Sampath, Jr.

Krishnaswamy Sampath, Jr. 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).

  • Non-chromate conversion coatings for aluminum and aluminum alloys
    Patent number: 6248183
    Abstract: A method and solution for forming a non-chromate conversion coating on an aluminum substrate. The invention was developed to replace the potentially toxic chromic acid process. The method provides a conversion solution capable of substituting a select set of metallic ions for the aluminum ions of the gel formed on the substrate, wherein the metallic ions have ionic radii differing less than 35% of the aluminum ion radii and where the coordination numbers of the respective ions remain the same. The preferred substituting metal ion of the invention is manganese. Manganese was found to be a close match to both the ionic radii and coordination numbers of the aluminum ions to be replaced.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: June 19, 2001
    Assignee: Concurrent Technologies Corporation
    Inventor: Krishnaswamy Sampath, Jr.