Patents by Inventor Ralf Buestrich

Ralf Buestrich 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).

  • Organically modified silicic acid polycondensates, production and use thereof
    Patent number: 6984483
    Abstract: The invention relates to organically modified, stable in storage, UV curable, NIR permeable silicic acid polycondensates which are photostructurable in layers having a thickness of 1 to 150 ?m. The invention also relates to the production and use thereof as negative resists. The polycondensates according to the invention are obtainable by condensation of organically modified silanediols of the formula I with organically modified silanes of the formula II. Ar2Si(OH)2 ??(I) RSi(OR?)3 ??(II) The radicals are identical or different and have the following meaning: Ar=a radical having 6 to 20 carbon atoms and at least one aromatic group, R=an organic radical having 2 to 15 carbon atoms and at least one epoxy group and/or at least one C?C double bond, R?=methyl or ethyl. Condensation occurs without the addition of water. The molar ratio of said compounds I and II is 1:1.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: January 10, 2006
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christof Roscher, Ralf Buestrich