Patents by Inventor Richard Neuzil

Richard Neuzil 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).

  • Method of converting a polymerizable composition into thermoplastic polyurethane of improved yellowness index and article obtained by this method
    Patent number: 9163133
    Abstract: Method of producing a thermoplastic polyurethane having a light stabilization useful for ophthalmic applications, comprising combining precursors of a polyurethane and at least one antioxidant, and incorporating therein, either before, during or after polymerization, at least one light stabilizer, said method being characterized in that the antioxidant is benzenepropanoic acid, 3(1,1-dimethylethyl)-4-hydroxy-5-methyl-1,1?-[1,2-ethanediylbis(oxy-2,1-ethanediyl)]ester and the light stabilizer is bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate together with at least one additional component chosen from among phenol, 2-(5-chloro-2H-benzotriazole-2-yl)-6-(1,1-dimethylethyl)-4-methyl and 2,2?-methylenebis(6-(2H-benzotriazol-2-yl)-4-1,1,3,3-tetramethylbutyl)phenol).
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: October 20, 2015
    Assignee: Essilor International (Compagnie générale d'Optique)
    Inventors: Hao-Wen Chiu, Richard Neuzil, Timothy E. Herod
  • METHOD OF CONVERTING A POLYMERIZABLE COMPOSITION INTO THERMOPLASTIC POLYURETHANE OF IMPROVED YELLOWNESS INDEX AND ARTICLE OBTAINED BY THIS METHOD
    Publication number: 20130158156
    Abstract: Method of producing a thermoplastic polyurethane having a light stabilization useful for ophthalmic applications, comprising combining precursors of a polyurethane and at least one antioxidant, and incorporating therein, either before, during or after polymerization, at least one light stabilizer, said method being characterized in that the antioxidant is benzenepropanoic acid, 3(1,1-dimethylethyl)-4-hydroxy-5-methyl-1,1?-[1,2-ethanediylbis(oxy-2,1-ethanediyl)]ester and the light stabilizer is bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate together with at least one additional component chosen from among phenol, 2-(5-chloro-2H-benzotriazole-2-yl)-6-(1,1-dimethylethyl)-4-methyl and 2,2?-methylenebis(6-(2H-benzotriazol-2-yl)-4-1,1,3,3-tetramethylbutyl)phenol).
    Type: Application
    Filed: December 23, 2009
    Publication date: June 20, 2013
    Applicant: Essilor International (Compagnie generale d'Optique
    Inventors: Hao-Wen Chiu, Richard Neuzil, Timothy E. Herod