Patents Assigned to PPT Research
  • Corrosion inhibiting compositions
    Patent number: 7727420
    Abstract: Corrosion inhibiting composition for use in aqueous or semi-aqueous stripping, cleaning, abrasive lapping and abrasive slurry compositions that form 5, 6, 7, or 8-membered chelating rings with a base metal together with a film forming polymeric chelation agent. Optionally there is included an oxygen scavenger.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: June 1, 2010
    Assignee: PPT Research
    Inventor: Irl E. Ward
  • Wafer/Ingot cleaning in wire saw cutting comprising an ethoxylated alcohol/polyalkylsiloxane mixture
    Patent number: 7700535
    Abstract: There is provided a method and composition for rinsing sliced ingots into wafers from a wire saw cutting operation. The method uses an alkoxylated alcohol diluted in water alone or with a polyalkyl siloxane when the bath has a dynamic flow of water to prevent foaming.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: April 20, 2010
    Assignee: PPT Research
    Inventor: Irl E. Ward