Patents by Inventor Guido Tolotti

Guido Tolotti 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).

  • Mono-and Bis-acylphosphine oxide photoinitiator combinations
    Patent number: 6486228
    Abstract: Photoinitiator combinations comprising at least one compound of formula (I)  wherein R1 is C1-C4alkyl, C1-C4alkoxy or halogen; R2 is hydrogen, C1-C4alkyl, C1-C4alkoxy or halogen; R3 is, for example, C1-C20alkyl, cyclopentyl, cyclohexyl, phenyl-C1-C4alkyl, naphthyl or biphenylyl or an O-, S- or N-containing 5- or 6-membered heterocyclic ring; and at least one compound of formula (II)  wherein R1 and R2 are as defined above; R9 is, for example, C1-C20alkyl, cyclopentyl, cyclohexyl, phenyl-C1-C4alkyl, naphthyl, biphenylyl or an O-, S- or N-containing 5- or 6-membered heterocyclic ring; and R10 is, for example, C1-C20alkyl, C2-C20alkyl interrupted by one or more O atoms, cyclopentyl, cyclohexyl, phenyl-C1-C4alkyl, naphthyl, biphenylyl or an O-, S- or N-containing 5- or 6-membered heterocyclic ring; are reactive photohardeners causing only a low degree of yellowing in the cured substrates.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: November 26, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Manfred Köhler, Jean-Pierre Wolf, André Litzler, Guido Tolotti, Nils Hoeck
  • Photoinitiator combinations
    Publication number: 20010036978
    Abstract: Photoinitiator combinations comprising
    Type: Application
    Filed: March 28, 2001
    Publication date: November 1, 2001
    Inventors: Manfred Kohler, Jean-Pierre Wolf, Andre Litzler, Guido Tolotti, Nils Hoeck
  • Photoinitiator combinations
    Patent number: 6251963
    Abstract: Photoinitiator combinations comprising at least one compound of formula (I) R1 is C1-C4alkyl, C1-C4alkoxy or halogen; R2 is hydrogen, C1-C4alkyl, C1-C4alkoxy or halogen; R3 is, for example, C1-C20alkyl, cyclopentyl, cyclohexyl, phenyl-C1-C4alkyl, naphthyl or biphenylyl or an O—, S— or N-containing 5- or 6-membered heterocyclic ring; and at least one compound of formula (II) R1 and R2 are as defined above; R9 is, for example, C1-C20alkyl, cyclopentyl, cyclohexyl, phenyl-C1-C4alkyl, naphthyl, biphenylyl or an O—, S— or N-containing 5- or 6-membered heterocyclic ring; and R10 is, for example, C1-C20alkyl, C2-C20alkyl interrupted by one or more O atoms, cyclopentyl, cyclohexyl, phenyl-C1-C4alkyl, naphthyl, biphenylyl or an O—, S— or N-containing 5- or 6-membered heterocyclic ring; are reactive photo hardeners causing only a low degree of yellowing in the cured substrates.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: June 26, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Manfred Köhler, Jean-Pierre Wolf, André Litzler, Guido Tolotti, Nils Hoeck