Patents by Inventor Rainer Freudenberger

Rainer Freudenberger 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).

  • PROCESS FOR MAKING SILICONE RUBBER BASE COMPOSITIONS
    Publication number: 20230399474
    Abstract: A process and apparatus for the continuous preparation of silicone rubber base compositions as well as the resulting compositions produced therefrom. This disclosure aims to cover a new continuous manufacturing process for making silicone rubber base compositions using an in situ silica treatment. The new continuous manufacturing process uses twin-screw extruder (TSE) technology.
    Type: Application
    Filed: November 11, 2021
    Publication date: December 14, 2023
    Inventors: Kalyn FROESCHLE, Jens NATTERODT, Rainer FREUDENBERGER, Thomas PEITZ, Roger ROMAIN, Ruediger SIEBMANN
  • Process and apparatus to make liquid silicone rubber compositions
    Patent number: 11820895
    Abstract: Provided are an assembly and process for the continuous or semi-continuous preparation of addition-crosslinking liquid silicone rubbers and to liquid silicone rubber compositions made therefrom. Also disclosed are articles made from the liquid silicone rubber compositions.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: November 21, 2023
    Assignee: DOW SILICONES CORPORATION
    Inventors: Jianjun Gao, Rainer Freudenberger, Franz Heidenfelder, Ruediger Siebmann, Kalyn Froeschle, Travis L. Clements
  • PROCESS AND APPARATUS TO MAKE LIQUID SILICONE RUBBER COMPOSITIONS
    Publication number: 20200255663
    Abstract: Provided are an assembly and process for the continuous or semi-continuous preparation of addition-crosslinking liquid silicone rubbers and to liquid silicone rubber compositions made therefrom. Also disclosed are articles made from the liquid silicone rubber compositions.
    Type: Application
    Filed: July 31, 2018
    Publication date: August 13, 2020
    Inventors: Jianjun GAO, Rainer FREUDENBERGER, Franz HEIDENFELDER, Ruediger SIEBMANN, Kalyn FROESCHLE, Travis L. CLEMENTS
  • Copolymers comprising propellanes and contact lenses made therefrom
    Patent number: 5362767
    Abstract: The invention relates to contact lenses made from a copolymer comprising units of formula I ##STR1## wherein R.sup.1 and R.sup.2 are each independently of the other hydrogen, alkyl, alkoxyalkyl, organosilylalkyl or organosilyl, R.sup.3 and R.sup.4 are each hydrogen or, taken together, are a divalent alkylene radical containing up to 8 carbon atoms, and A is a divalent substituted 1,2-ethylene radical which is derived from a copolymerisable vinyl monomer by virtue of the vinyl double bond being replaced with a single bond. The invention further relates to the copolymers themselves, to the use thereof for making contact lenses, and to a process for making contact lenses from such copolymers.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: November 8, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Peter Herbrechtsmeier, Horst Schafer, Bernhard Seiferling, Arnulf-Dieter Schluter, Harald Bothe, Rainer Freudenberger