Patents by Inventor Rujee Lorpitthaya

Rujee Lorpitthaya 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).

  • Polishing composition containing hybrid abrasive for nickel-phosphorous coated memory disks
    Patent number: 8518135
    Abstract: The invention provides a polishing composition that contains (a) an abrasive comprising (i) first alpha alumina particles that have an average aspect ratio of 0.8:1 to 1.2:1, (ii) second alpha alumina that have an average aspect ratio of greater than 1.2:1, (iii) fumed alumina particles, and (iv) wet-process silica particles, and (b) water. The invention also provides a method of polishing a substrate, especially a nickel-phosphorous substrate, with the polishing composition.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: August 27, 2013
    Assignee: Cabot Microelectronics Corporation
    Inventors: Rujee Lorpitthaya, Selvaraj Palanisamy Chinnathambi, Haresh Siriwardane