Patents by Inventor Bernhard Leusner

Bernhard Leusner 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).

  • Thixotropic formulations of silicone pastes for impressions of teeth and mucous membrane
    Patent number: 4389496
    Abstract: The invention relates to thixotropic formulations of silicone pastes for the production of exact impressions of teeth and mucous membrane.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: June 21, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard Leusner, Hans-Hermann Schulz, Reiner Voigt, Michael Walkowiak
  • Dental material based on crosslinked plastic and polymerizable binder
    Patent number: 4369262
    Abstract: The invention includes dental materials based on organic plastics in paste form, comprising at least one phase consisting essentially of finely divided, crosslinked plastics which contain copolymerized ester(s) of methacrylic acid to the extent of at least 50% by weight, and the second phase consisting essentially of ester(s) of methacrylic acid to the extent of at least 50% by weight. The materials can be used for making prostheses, crowns, bridges, artificial teeth, dental fillings, etc.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: January 18, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Walkowiak, Wolfgang Podszun, Bernhard Leusner, Carlhans Suling, Hans-Hermann Schulz
  • Dental materials based on organic plastics in paste form
    Patent number: 4308190
    Abstract: A dental material is provided based on organic plastics in paste form, which consists essentially of (a) a polymerizable binder, (b) a crosslinked bead polymer and (c) a fine-particled inorganic filler.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: December 29, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Walkowiak, Wolfgang Podszun, Bernhard Leusner, Carlhans Suling, Hans H. Schulz
  • Dental materials which are opaque to X-rays and are based on organic plastics in paste form
    Patent number: 4302376
    Abstract: The invention provides dental materials which are opaque to X-rays and are based on organic plastics in paste form, which comprises (a) a polymerizable binder, (b) a crosslinked bead polymer and (c) an X-ray contrast medium. The materials can also contain as an additional component (d) a fine-particled inorganic filler which is not opaque to X-rays. The materials are useful, inter alia, for filing dental cavities.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: November 24, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Walkowiak, Wolfgang Podszun, Bernhard Leusner, Carlhans Suling, Hans H. Schulz
  • Dental filling material
    Patent number: 4177563
    Abstract: The invention includes formulated dental filling materials comprising a polymerizable organic plastics material containing inorganic fillers, which filling material comprises at least two pastes in intimate admixture with one another in a paste/paste system in which hardening is initiated by means of a peroxidic initiator and an accelerator, wherein said at least two pastes contain different inorganic fillers with different chemical constitutions such that one of said at least two pastes contains filler with a substantially higher proportion of elements with high atomic number than does the other of said at least two pastes. Also included in the invention is a dental filling pack containing said formulated dental filling materials as well as a method for their use.
    Type: Grant
    Filed: May 19, 1978
    Date of Patent: December 11, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Robert Schmitz-Josten, Manfred Borgardt, Hans-Hermann Schulz, Michael Walkowiak, Bernhard Leusner, Carlhans Suling
  • Pasty compositions for crosslinking organopolysiloxanes to silicone rubber
    Patent number: 4174338
    Abstract: A pasty composition for the room temperature crosslinking and curing of a vulcanizable organopolysiloxane, comprising a crosslinking agent for an organopolysiloxane, a curing catalyst therefor, and about 3-40% by weight of the total amount of the pasty composition of active hydrophilic silica as a thickener. The pasty composition may additionally contain up to about 40% by weight of at least one inactive filler. Advantageously, the organopolysiloxane is in one tube and the pasty composition is in another; lengths of material are squeezed out in easily ascertained proportions and are mixed in the presence of water, e.g. water vapor in the atmosphere, the mixture setting to a silicone rubber.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: November 13, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz Goller, Hans-Hermann Schulz, Bernhard Leusner