Patents by Inventor Gerd H. Dahms

Gerd H. Dahms 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: 8623809
    Abstract: The invention relates to pumpable aqueous pearlescent concentrates having a high active content of alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, mono and diesters of sulfosuccinic acid (sulfosuccinates), alkyl glycinates, alkyl sarcosinates, and/or alkyl taurates, and fatty acid glycol esters and/or carbolic acid amides as pearlescent agents, and to a method for the production thereof. The pearlescent concentrates according to the invention are suitable as additives for improving the optical appearance of tenside components, for example of liquid washing and cleaning agents or liquid body wash and body care agents and hair care agents.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: January 7, 2014
    Assignee: OTC GmbH
    Inventors: Gerd H. Dahms, Andreas H. Jung
  • Publication number: 20120149629
    Abstract: The invention relates to pumpable aqueous pearlescent concentrates having a high active content of alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, mono and diesters of sulfosuccinic acid (sulfosuccinates), alkyl glycinates, alkyl sarcosinates, and/or alkyl taurates, and fatty acid glycol esters and/or carbolic acid amides as pearlescent agents, and to a method for the production thereof. The pearlescent concentrates according to the invention are suitable as additives for improving the optical appearance of tenside components, for example of liquid washing and cleaning agents or liquid body wash and body care agents and hair care agents.
    Type: Application
    Filed: August 27, 2010
    Publication date: June 14, 2012
    Applicant: OTC GMBH
    Inventors: Gerd H. Dahms, Andreas H. Jung
  • Patent number: 7393817
    Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: July 1, 2008
    Assignee: Sasol Germany GmbH
    Inventors: Klaus Kwetkat, Gerd H. Dahms
  • Publication number: 20040176266
    Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.
    Type: Application
    Filed: March 10, 2004
    Publication date: September 9, 2004
    Inventors: Klaus Kwetkat, Gerd H. Dahms
  • Patent number: 6710022
    Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: March 23, 2004
    Assignee: Sasol Germany GmbH
    Inventors: Klaus Kwetkat, Gerd H. Dahms
  • Publication number: 20040033913
    Abstract: This invention relates to aqueous, flowable pearly luster concentrates containing one or more pearlescent component(s), gemini surfactant(s), and at least one additional surfactant.
    Type: Application
    Filed: May 28, 2003
    Publication date: February 19, 2004
    Inventors: Gerd H Dahms, Klaus Kwetkat
  • Publication number: 20030202948
    Abstract: O/W emulsions, contain at least one organosilicon compound bearing a glycoside radical and at least one metal oxide are present. The emulsions are stable with respect to pH and exhibit a high degree of dispersion of the metal oxide. The emulsions are particularly useful as cosmetic formulations, in particular as sun screen lotions and creams.
    Type: Application
    Filed: March 20, 2003
    Publication date: October 30, 2003
    Applicant: Wacker-Chemie GmbH
    Inventors: Thomas Koini, Gerd H. Dahms
  • Patent number: 6171600
    Abstract: The stable multiple emulsion of the X/O/Y type contains at least one X/O phase in which X is an oil-immiscible component and O an oil phase. The X/O phase can contains an active substance, possibly in solid form, for example for medical, cosmetic or technical applications. The Y phase can be an aqueous phase, an aqueous liquid, preferably liquid-crystalline, gel or a W/O/W emulsion and serves as carrier for the at least one X/O phase. The X/O phase is produced using an emulsifier that has an HLB value equal to or less than 6 and/or is a W/O emulsifier. The preparation of the X/O phase itself and its diffusion in the Y phase are done with standard stirring tools. The drops of the X/O phase have long-term stability and, even when greatly diluted, do not interact with the Y phase or the drops or other X/O phases dispersed therein.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: January 9, 2001
    Assignee: IFAC GmbH
    Inventor: Gerd H. Dahms
  • Patent number: 6034172
    Abstract: The invention relates to emulsifier mixtures for preparing water-soluble polymers by inverse emulsion polymerization of corresponding monomers or monomer mixtures, to a process for preparing the water-soluble polymers, and to the monomer/water-in-oil emulsions thus obtained. The emulsifier mixture comprises glycerol monooleate and one or more diacetyltartrates of fatty acid glyceride.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: March 7, 2000
    Assignee: Th. Goldschmidt AG
    Inventors: Felix Muller, Gerd H. Dahms
  • Patent number: 5911981
    Abstract: Surfactant blends that generate a stable spherical foam are disclosed. The surfactant blends contain a nonionic surfactant or an amphoteric surfactant as the principal foaming agent, and a sufficient amount of an acylate lactylate to enhance foam volume and provide a foam that remains in a spherical form for up to about forty minutes. A method of generating a long-lasting foam also is disclosed.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: June 15, 1999
    Assignee: R.I.T.A. Corporation
    Inventors: Gerd H. Dahms, James W. Cook
  • Patent number: 5744062
    Abstract: Balanced emulsifier blends that provide a stable oil-in-water emulsion of preselected viscosity are disclosed. The emulsifier blend contains an acyl lactylate as the primary emulsifier and a nonionic surfactant as the coemulsifier. A method of preparing an oil-in-water emulsion having a preselected viscosity also is disclosed.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: April 28, 1998
    Assignee: R.I.T.A. Corporation
    Inventors: Gerd H. Dahms, James W. Cook
  • Patent number: 5674475
    Abstract: Emulsifier composition is a mixture of polyglycerol fatty acid ester (n.gtoreq.4) and the lactylate of a fatty acid (C.gtoreq.8) or its salt and is used to manufacture a wide range of different O/W emulsions, e.g. sunscreen emulsions for cosmetics. The polyglycerol fatty acid ester preferably has an HLB value.ltoreq.8. The emulsifier composition can additionally contain a lipophilic emulsifier.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: October 7, 1997
    Assignees: IFAC GmbH, Nikko Chemicals Co., Ltd.
    Inventors: Gerd H. Dahms, Masato Tagawa
  • Patent number: 5603863
    Abstract: The invention concerns a process for producing a water-in-oil emulsion comprising mixing an oil dispersion of particles of a metallic oxide having a primary particle size less than 0.2 micron with one or more emulsifiers and an aqueous phase.The method enables the production of such emulsions containing relatively small quantities of emulsifiers and a novel emulsion made available by the invention contains less than 1% by weight of emulsifiers, 10 to 60% by weight of an oil phase and at least 40% by weight of an aqueous phase.The emulsions so formed are useful in preparing UV absorbing compositions such as sunscreens, skin protectants, moisturisers and after-sun lotions.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: February 18, 1997
    Assignee: Tioxide Specialties Limited
    Inventor: Gerd H. Dahms
  • Patent number: 5543135
    Abstract: The invention concerns a process for producing a water-in-oil emulsion comprising mixing an oil dispersion of particles of a metallic oxide having a primary particle size less than 0.2 micron with one or more emulsifiers and an aqueous phase.The method enables the production of such emulsions containing relatively small quantities of emulsifiers and a novel emulsion made available by the invention contains less than 1% by weight of emulsifiers, 10 to 60% by weight of an oil phase and at least 40% by weight of an aqueous phase.The emulsions so formed are useful in preparing UV absorbing compositions such as sunscreens, skin protectants, moisturizers and after-sun lotions.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: August 6, 1996
    Assignee: Tioxide Specialties Limited
    Inventor: Gerd H. Dahms
  • Patent number: 5516457
    Abstract: An oil-in-water emulsion containing 0.5% to 30% metallic oxides having a particle size of less than 0.2 micron, less than 10% total emulsifier, 5% to 30% of an oil phase and at least 60% of an aqueous phase is provided. The invention also makes available a method of preparing such emulsions in which the emulsion is formed by use of a dispersion in water of the metallic oxide particles. By comparison with previously known emulsions of this type relatively small quantities of emulsifiers are used and it is possible to use an emulsion system with a low HLB value (e.g. less than 6). Preferably no hydrophilic emulsifiers are used. The emulsions are suitable for preparing UV-absorbing compositions such as sunscreens, moisturisers and after-sun lotions. The ability to use no, or little, hydrophilic emulsifiers is advantageous since, in, general, these emulsifiers are not biodegradable whereas hydrophobic emulsifiers generally are biodegradable.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: May 14, 1996
    Assignee: Tioxide Specialties Limited
    Inventor: Gerd H. Dahms
  • Patent number: 5443759
    Abstract: An oil-in-water emulsion containing 0.5% to 30% metallic oxides having a particle size of less than 0.2 micron, less than 10% total emulsifier, 5% to 30% of an oil phase and at least 60% of an aqueous phase is provided.The invention also makes available a method of preparing such emulsions in which the emulsion is formed by use of a dispersion in water of the metallic oxide particles.By comparison with previously known emulsions of this type relatively small quantities of emulsifiers are used and it is possible to use an emulsion system with a low HLB value (e.g. less than 6). Preferably no hydrophilic emulsifiers are used.The emulsions are suitable for preparing UV-absorbing compositions such as sunscreens, moisturizers and after-sun lotions. The ability to use no, or little, hydrophilic emulsifiers is advantageous since, in, general, these emulsifiers are not biodegradable whereas hydrophobic emulsifiers generally are biodegradable.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: August 22, 1995
    Assignee: Tioxide Specialties Limited
    Inventor: Gerd H. Dahms