Patents by Inventor Stefan Petri

Stefan Petri 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).

  • Publication number: 20130276820
    Abstract: Methods and apparatus for the cleaning PECVD chambers that utilize molecular fluorine as the cleaning material.
    Type: Application
    Filed: August 10, 2011
    Publication date: October 24, 2013
    Inventors: Jean-Charles Cigal, Ying-Siang Hwang, Paul Alan Stockman, Richard Hogle, Stefan Petri
  • Publication number: 20130239988
    Abstract: Methods and apparatus for the cleaning reaction chambers using molecular fluorine as the cleaning material. The molecular fluorine is dissociated in-situ in the reaction chamber using the chamber RF power source.
    Type: Application
    Filed: August 18, 2011
    Publication date: September 19, 2013
    Inventors: Jean-Charles Cigal, Ying-siang Hwang, Paul Alan Stockman, Stefan Petri
  • Publication number: 20130220364
    Abstract: Methods and apparatus for the cleaning reactor box chambers using molecular fluorine as the cleaning material. The molecular fluorine is dissociated in-situ in the chamber using the chamber RF power source.
    Type: Application
    Filed: August 11, 2011
    Publication date: August 29, 2013
    Inventors: Jean-Charles Cigal, Stefan Petri, Paul Alan Stockman, Oliver Knieling
  • Patent number: 5925725
    Abstract: An emulsifier composition for water-dilutable epoxy resins comprise condensation products of an aliphatic polyol component having a weight-average molar mass (M.sub.w) of from 200 to 20,000 g/mol, where a mass fraction of at least 5%, has a weight-average molar mass (M.sub.w) of at least 4000 g/mol, and an epoxide component having of at least one epoxide compound having at least two epoxide groups per molecule and an epoxide group content of from 500 to 10,000 mmol/kg, the ratio of the number of hydroxyl groups to that of the epoxide groups (OH):(EP) being from 1:3.51 to 1:10. When the emulsifier is used for the preparation of aqueous epoxy resin systems, the end of the pot life is indicated by a sharp rise in viscosity.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: July 20, 1999
    Assignee: Vianova Resins GmbH
    Inventors: Armin Pfeil, Dieter Dreischhoff, Stefan Petri, Claus Godau
  • Patent number: 5612394
    Abstract: Aqueous epoxy resin dispersion comprising (A) an epoxy resin which is a condensation product of (A-1) from 50 to 95% by weight, preferably from 55 to 85% by weight, of one or more epoxide compounds having at least two epoxide groups per molecule and an epoxide equivalent mass of from 100 to 2000 g/mol, (A-2) from 5 to 50% by weight, preferably from 15 to 45% by weight, of an aromatic polyol; and (A-3) from 0 to 25% by weight, preferably from 0 to 10% by weight, of modifying compounds containing at least two epoxide-reactive groups; (B) a dispersant comprising (B-1) a condensation product of a polyol having a weight-average molecular mass (M.sub.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: March 18, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Armin Pfeil, Michael Hoenel, Paul Oberressl, Dieter Dreischhoff, Stefan Petri
  • Patent number: 5459180
    Abstract: Polyol/epoxy adducts obtained by reaction of(A) an aliphatic polyol having an average molecular weight (Mw) of 200 to 2000 and(B) an epoxy compound having at least two epoxy groups per molecule and an epoxy equivalent weight of 100 to 2000,the equivalent ratio of the OH groups to the epoxy groups being 1:3.51 to 1:10, preferably 1:4 to 1:9, particularly preferably 1:45 to 1:8, and the epoxy equivalent weight of the adduct being between 150 g/eq and at least 800 g/eq, preferably between 250 g/eq and 1000 g/eq which adducts serve as nonionic emulsifiers in water-dilutable epoxy liquid resins.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: October 17, 1995
    Assignee: Hoechst AG
    Inventors: Armin Pfeil, Joerg-Peter Geisler, Claus Godau, Bernhard Stengel-Rutkowski, Matthias Meyer, Stefan Petri
  • Patent number: 5358982
    Abstract: Crosslinked polymer microparticles based on epoxy resin obtained by polymerization of aqueous dispersions (A) of compounds containing epoxide groups in the presence of up to 0.2 mol, preferably 0.02 to 0.15 mol (based on the nitrogen contained in (B)) of a nitrogen-containing organic compound (B) per epoxide equivalent and subsequent isolation which are preferably in the form of aqueous dispersions thereof, and are suitable as organic fillers, pigments, matting agents and/or reinforcing agents for binder systems and individual components thereof, paint formulations, coating and molding compositions, intermediate coatings, adhesives and the like, preferably based on water.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: October 25, 1994
    Assignee: Hoechst Aktiengesellschaft AG
    Inventors: Joerg-Peter Geisler, Stefan Petri