Patents by Inventor David Stevenson Stone

David Stevenson Stone 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).

  • Optically clear high temperature resistant silicone polymers of high refractive index
    Patent number: 7160972
    Abstract: A thermally stable polysiloxane composition is a cross-linked product of a Part A composition, of a Part B composition and a catalyst, the Part A composition being a polysiloxane having 60 to 75 percent by weight phenyl groups, the Part B composition being a polysiloxane having 50 to 80 percent by weight phenyl groups. The composition has the properties of optical clarity as measured by 90% or greater transmission of light of 400 nm wavelength in a 1.0 centimeter path, a refractive index at 589 nm of 1.545 or greater and still has 90% or greater transmission of light of 400 nm wavelength in a 1.0 centimeter path after exposure to 150° C. for 6 hours. The composition is well suited for application as an optically transmissive cover or lens for light emitting diodes and for use in other optical and related devices.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: January 9, 2007
    Assignee: NuSil Technology LLC
    Inventors: Nickelous David Young, David B. Stone, legal representative, Robert Vincent Thomaier, Keith Bryan Reichel, David Stevenson Stone, deceased
  • Optically clear high temperature resistant silicone polymers of high refractive index
    Publication number: 20040198924
    Abstract: A thermally stable polysiloxane composition is a cross-linked product of a Part A composition, of a Part B composition and a catalyst, the Part A composition being a polysiloxane having 60 to 75 percent by weight phenyl groups, the Part B composition being a polysiloxane having 50 to 80 percent by weight phenyl groups. The composition has the properties of optical clarity as measured by 90% or greater transmission of light of 400 nm wavelength in a 1.0 centimeter path, a refractive index at 589 nm of 1.545 or greater and still has 90% or greater transmission of light of 400 nm wavelength in a 1.0 centimeter path after exposure to 150° C. for 6 hours. The composition is well suited for application as an optically transmissive cover or lens for light emitting diodes and for use in other optical and related devices.
    Type: Application
    Filed: February 12, 2004
    Publication date: October 7, 2004
    Inventors: Nickelous David Young, David Stevenson Stone, David B. Stone, Robert Vincent Thomaier, Keith Bryan Reichel