Patents Assigned to SIGMA S.p.A.
  • Patent number: 6399047
    Abstract: Compounds of formula (I), wherein the groups are as defined in the disclosure, as well as the use thereof in cosmetic compositions and in the stabilization of synthetic polymers.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: June 4, 2002
    Assignee: 3V Sigma S.p.A.
    Inventors: Giuseppe Raspanti, Giorgio Zanchi
  • Patent number: 6326430
    Abstract: A method for thickening an acidic aqueous composition. The method is based upon the addition of a crosslinked cationic homopolymer of a cationic monomer of formula I in which: R is hydrogen, (C1-4)alkyl, or the radical CH2COOH, R1 is hydrogen, methyl, carboxy, or the radical CH3—CH═CH, R2 is methylene or a straight or branched (C2-4) alkylene moiety, R3, R4, and R5 are independently hydrogen or (C1-4) alkyl, and X is chlorine, bromine, iodine, hydrogen sulfate, or methosulfate to the aqueous solution in an amount ranging from about 0.01 to about 5% of the weight of the acidic aqueous composition. The homopolymers are crosslinked with a crosslinking agent containing at least two ethylenically unsaturated moieties present in amounts ranging from not less than 50 to about 600 ppm of the homopolymer total weight.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: December 4, 2001
    Assignee: 3V SIGMA S.p.A.
    Inventor: Ferruccio Berte′
  • Patent number: 5393517
    Abstract: Derivatives of 2,4,6-tris-[(p-carboxy)-anilino]-5-triazine are described, which can be used as light stabilizers for synthetic polymers and for the preparation of cosmetic and dermatological compositions.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: February 28, 1995
    Assignee: 3V Sigma S.p.A.
    Inventor: Raspanti Giuseppe
  • Patent number: 5382588
    Abstract: Free radical deactivating 4- or 1,4-substituted, 2,2,6,6-tetramethyl piperidines are condensed with UV absorbing cinnamic acids or benzoic acids or benzoazols or benzophenones to produce skin anti-aging compounds and compositions which have both free radical deactivation and UV absorbing properties.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: January 17, 1995
    Assignee: 3V Sigma S.p.A.
    Inventor: Giuseppe Raspanti
  • Patent number: 4017929
    Abstract: A device for pressing Louis shoe heels is provided comprising a lever pivotally mounted on the press cushion and carrying at the point of application of the load the usual felt pad or the like intended to be applied against the outer periphery of the heel and subjected to the action of an actuator at the point of application of the effort.The lever can be turned over in order to bring the device in an inoperative position wherein it no longer interferes with the operator.
    Type: Grant
    Filed: April 1, 1976
    Date of Patent: April 19, 1977
    Assignee: SIGMA S.p.A.
    Inventor: Antonio Capuano
  • Patent number: 4017930
    Abstract: A device for cementing soles on the base surface of shoes is provided.The device is provided with a cushion formed of a plurality of blocks resiliently movable and adapted to automatically lock in a position where they mate the shoe lower surface. This locking operation is controlled by a microswitch actuated by the block corresponding to the shoe waist. The heel pressing block is also locked simultaneously with said plurality of blocks.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: April 19, 1977
    Assignee: Sigma S.p.A.
    Inventor: Antonio Capuano