{
  "patent_number": "US 6793929",
  "country": "US",
  "title": "How to Make Stable, High-Water Content Skin Creams",
  "original_title": "Preparations of the w/o emulsion type with an increased water content, comprising moderately polar lipids and silicone emulsifiers and, if desired, cationic polymers",
  "summary": "A recipe for creating stable skin lotions that are mostly water but feel like rich, oily creams by using specific silicone emulsifiers and carefully balanced oils.",
  "what_it_does": "This patent describes a way to mix a large amount of water (at least 80% of the total weight) into an oil-based cream without the mixture separating. Usually, oil and water don't like to mix, but the inventors use specific 'interface-active' substances—specifically alkylmethicone or alkyldimethicone copolyols—to act as a bridge between the two. The oil phase is carefully chosen to have a specific 'polarity' (a measure of how the oil molecules interact with water) between 20 and 30 mN/m. This allows the product to remain a thin, spreadable liquid (with a viscosity under 5000 mPa·s) while still delivering the benefits of a moisturizing cream.",
  "what_it_does_not_cover": [
    "Does not cover emulsions where the water content is less than 80% by weight.",
    "Does not cover oil phases with a polarity outside the specific 20-30 mN/m range.",
    "Does not cover creams that are thick, paste-like, or have a viscosity higher than 5000 mPa·s.",
    "Does not cover emulsions that use standard emulsifiers not listed as alkylmethicone or alkyldimethicone copolyols."
  ],
  "filed": "2000-05-23",
  "granted": "2004-09-21",
  "expires": null,
  "status": "active",
  "holder": "Beiersdorf AG",
  "holder_url": "https://patentbrief.org/company/beiersdorf-ag",
  "inventors": [
    {
      "name": "Rainer Kropke",
      "url": "https://patentbrief.org/inventor/rainer-kropke"
    },
    {
      "name": "Jens Nielsen",
      "url": "https://patentbrief.org/inventor/jens-nielsen"
    },
    {
      "name": "Gunther Schneider",
      "url": "https://patentbrief.org/inventor/gunther-schneider"
    },
    {
      "name": "Andreas Bleckmann",
      "url": "https://patentbrief.org/inventor/andreas-bleckmann"
    },
    {
      "name": "Stephanie von der Fecht",
      "url": "https://patentbrief.org/inventor/stephanie-von-der-fecht"
    }
  ],
  "times_cited": 25,
  "tags": [
    "consumer_electronics",
    "materials"
  ],
  "abstract": "Water-in-oil emulsions (a) with a content of water and optionally water-soluble substances totalling at least 75% by weight, and with a content of lipids, emulsifiers and lipophilic constituents totalling at most 25%, preferably at most 20%, based in each case on the total weight of the preparations, (b) whose oil phase is chosen from the group of lipids or lipid mixtures, where the total polarity of the lipid phase is between 20 and 30 mN/m, (c) comprising at least one interface-active substance, chosen from the group of alkylmethicone copolyols and/or alkyldimethicone copolyols, (d) optionally, but particularly when the content of water and water-soluble (hydrophilic) constituents is between 75 and 80% by weight, comprising one or more cationic polymers.",
  "url": "https://patentbrief.org/patent/us/6793929/herceptin-chemotherapy-combination",
  "markdown_url": "https://patentbrief.org/patent/us/6793929/herceptin-chemotherapy-combination/md",
  "google_patents_url": "https://patents.google.com/patent/US6793929",
  "relatedPatents": []
}