Patents by Inventor Hans Lagnemo

Hans Lagnemo 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).

  • Patent number: 6071431
    Abstract: The invention relates to particles comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions and an amino acid of the formula (HOOC) .sub.2 N--C.sub.n H.sub.m COO--R in which R is H,CH.sub.2 OH, or CH.sub.3, n is 1, 2 or 3 and m is 0-2n; or a salt thereof. The invention also relates to use of the particles and a composition comprising such particles.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: June 6, 2000
    Assignee: EKA Chemicals AB
    Inventors: Hans Lagnemo, Monica Jigstam
  • Patent number: 5929015
    Abstract: The invention relates to particles having a core comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions. The particles have a coating containing a silicate, and a water soluble magnesium salt, and the core and/or the coating contains an aliphatic organic compound or a salt thereof as a chelating agent. The invention also relates to preparation and use of the particles as well as a composition containing such particles.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: July 27, 1999
    Assignee: EKA Chemicals AB
    Inventors: Hans Lagnemo, Monica Jigstam
  • Patent number: 5902783
    Abstract: The invention relates to particles having a core comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions, which particles have a coating containing alkali metal silicate and a chelating agent. The invention also relates to preparation and use of the particles as well as a composition containing such particles.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: May 11, 1999
    Assignee: Eka Chemicals AB
    Inventors: Hans Lagnemo, Monica Jigstam
  • Patent number: 5846922
    Abstract: The invention relates to particles having a core comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions, which particles have a coating containing a chelating agent selected from alkali metal salts or alkaline earth metal salts of a hydroxy carboxylic acid satisfying the formula: RC.sub.n H.sub.m (OH).sub.n COOH in which R is CH.sub.2 OH or COOH, n is 2-6 and m is 0-n. The invention also relates to preparation and use of the particles, as well as a composition containing such particles.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: December 8, 1998
    Assignee: Eka Chemicals AB
    Inventors: Hans Lagnemo, Monica Jigstam
  • Patent number: 5827811
    Abstract: The invention relates to particles comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions and up to 15% by weight of a dicarboxylic acid having from 5 to 10 carbon atoms or a salt thereof. The invention also relates to use of the particles and a composition comprising such particles.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: October 27, 1998
    Assignee: EKA Chemicals AB
    Inventors: Hans Lagnemo, Monica Jigstam, Cecilia Oddstig
  • Patent number: 5415668
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: May 16, 1995
    Assignee: Eka Nobel AB
    Inventors: Hans Lagnemo, Annbritt Forsstrom
  • Patent number: 5395543
    Abstract: A particulate alkaline detergent contains an alkaline agent and an alkali perborate hydrate and/or an alkali carbonate peroxohydrate as bleaching agent. As a result of coating at least the alkaline agent or the bleaching agent with an alkyl glycoside or an alkyl glycamide, the detergent has a low tendency to caking as well as excellent cleaning capacity. The alkyl glycoside is a C.sub.6 -C.sub.10 -alkyl glycoside having a degree of polymerization of 1-4, and the alkyl glycamide has formula (I), wherein R.sub.1 is hydrogen or an alkyl group having 1-4 carbon atoms, and R.sub.2 is an alkyl group having 6-10 carbon atoms. A bleaching agent and an alkaline agent coated with the alkyl glycoside and/or the alkyl glycamide are also disclosed.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: March 7, 1995
    Assignees: Berol Nobel AB, Eka Nobel AB
    Inventors: Ingegard Johansson, Hans Lagnemo, Catarina Nordstrom-Lang, Annika Akerman
  • Patent number: 5336433
    Abstract: The present invention relates to particles having a core comprising a peroxy compound and a hydrophobic coating comprising:(a) a hydrophobic substance selected from saturated fats, waxes or phosphatides;(b) a surfactant dissolved in the hydrophobic substance;(c) water swellable grains;the hydrophobic substance and the surfactant being substantially inert in respect of the peroxy compound.The invention also relates to preparation and use of the particles. Further, the invention relates to a composition containing such coated particles.
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: August 9, 1994
    Assignee: Eka Nobel AB
    Inventors: Hans Lagnemo, Robert E. Sparks, Irwin C. Jacobs