Patents by Inventor Bernd Meissner

Bernd Meissner 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).

  • Publication number: 20190314909
    Abstract: A method for producing a toothing with multiple teeth of a gear element for a gas turbine engine including the following steps: predefining a tooth root shape that defines a shape of the toothing in the area of tooth roots of adjacent teeth, wherein the tooth root shape is described by a spline curve at least in certain sections, in particular completely; and forming the toothing with the tooth root shape. A toothing for a gear element includes multiple teeth and a tooth root shape which is formed in the area of tooth roots of adjacent teeth and which is formed according to a spline curve at least in certain sections, in particular completely.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 17, 2019
    Inventors: David KRUEGER, Peter Michael FLASSIG, Bernd MEISSNER, Chen-Xiang CHAO
  • Patent number: 4347388
    Abstract: 3,6-Dimethyl-3-hydroxy-oct-1-ynes and -oct-1-enes and their esters with lower alkanoic acids, of the general formula I ##STR1## where X and Y are H or the two X's and/or the two Y's together are a further bond between the carbon atoms on which they are present, and R is H, --CO--CH.sub.3, --CO--C.sub.2 H.sub.5 or --CO--C.sub.3 H.sub.7, their use as scents, and a process for the preparation of 3,6-dimethyl-3-hydroxy-octane. The novel compounds exhibit interesting, predominantly floral, woody, herbal and fruity notes. The alcohols of the formula I are of particular importance because they serve as intermediates for a novel and particularly advantageous method of obtaining 3,6-dimethyl-3-hydroxy-octane, a compound required in large amounts as a fragrance for soaps and detergents.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: August 31, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Gramlich, Werner Hoffmann, Leopold Hupfer, Bernd Meissner, Juergen Paetsch
  • Patent number: 4301084
    Abstract: In a process for the preparation of a carboxylic acid ester of .beta.-formyl-crotyl alcohol by rearrangement of the corresponding carboxylic acid ester of 2-formyl-2-hydroxy-but-3-ene or of an acetal or acylate thereof in the presence of copper or a copper compound, followed, where relevant, by hydrolytic cleavage of the acetal or acylate, more especially in the preparation of 4,4-dimethoxy-3-methyl-crotyl acetate, the yield is improved by carrying out the rearrangement in the presence of copper (I) chloride as the catalyst and ensuring that low-boiling by-products formed during the rearrangement are removed.The products are of great importance as starting materials for an industrial synthesis of vitamin A and its derivatives.
    Type: Grant
    Filed: August 31, 1979
    Date of Patent: November 17, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Harald Laas, Axel Nissen, Bernd Meissner
  • Patent number: 4235823
    Abstract: Diketones are prepared by oxidizing glycols in the presence of a silver catalyst and/or copper catalyst of a specific particle size, under specific temperature conditions and with a specific composition of the catalyst. The end products are starting materials for the preparation of dyes, drugs, plastics, scents, wrinkle-resist finishes and assistants for increasing the tear strength and resilience of fibrous materials, hardeners for use in the photographic industry, textile assistants for preventing shrinkage after washing, and paper assistants.
    Type: Grant
    Filed: June 26, 1979
    Date of Patent: November 25, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Dudeck, Gunter Lehmann, Karl-Heinz Ross, Werner Fliege, Norbert Petri, Hans Diem, Bernd Meissner, Wolfgang Sauer
  • Patent number: 4233246
    Abstract: Aliphatic hydroxycarbonyl compounds etherified with aliphatic groups are prepared by oxidizing hydroxyalcohols in the presence of a metal catalyst which consists of one or more layers, each of a particular weight and each containing particles of a particular size, the catalyst bed also having a particular total thickness, and the catalyst components used being silver and copper, with or without added copper/tin/phosphorus or silver alone. The etherified hydroxyaldehydes and hydroxyketones obtainable by the process of the invention are valuable starting materials for the preparation of dyes, pesticides, plastics and scents.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: November 11, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Dudeck, Gunter Lehmann, Norbert Petri, Hans Diem, Werner Fliege, Bernd Meissner, Karl-Heinz Ross, Wolfgang Muehlthaler
  • Patent number: 4229590
    Abstract: Alkyl pyruvates are prepared by oxidizing alkyl lactates in the presence of a silver catalyst of a defined particle size, at from 450.degree. to 700.degree. C. The products are starting materials for the preparation of drugs, synthetic resins and plastics.
    Type: Grant
    Filed: February 8, 1979
    Date of Patent: October 21, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Dudeck, Gunter Lehmann, Bernd Meissner, Hans Diem, Werner Fliege, Norbert Petri, Karl-Heinz Ross
  • Patent number: 4192820
    Abstract: 3-Methyl-2-buten-1-al is prepared by isomerizing 3-methyl-3-buten-1-al in the presence of acidic or basic compounds. The product is a starting material for the manufacture of dyes, pesticides, pharmaceuticals, plastics and scents.
    Type: Grant
    Filed: March 28, 1978
    Date of Patent: March 11, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Meissner, Werner Fliege, Otto Woerz, Christian Dudeck, Hans Diehm
  • Patent number: 4188344
    Abstract: 4-(m,m'-ditert.-butyl-p-hydroxyphenyl)-butan-2-ones are produced by reaction of a 4-hydroxybutanone-(2) with 2,6-ditert.-butylphenol in the presence of a strong acid at elevated temperature. The compounds obtainable by the process, particularly 4-(m,m'-ditert.-butyl-p-hydroxyphenyl)-butane-2-one, are starting materials for the production of dyes, pest control agents and plastics auxiliaries and particularly of stabilizers for polyolefins and polyamides.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: February 12, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Roman Fischer, Werner Fliege, Wolfgang Koernig, Bernd Meissner
  • Patent number: 4165342
    Abstract: 3-Alkyl-buten-1-als are prepared by oxidative dehydrogenation of 3-alkyl-buten-1-ols in the presence of a silver catalyst, of a particular total thickness, comprising 2 or more layers each of a particular weight and containing particles of a particular size. The products are starting materials for the manufacture of dyes, pesticides, drugs, plastics, naturally occurring materials and scents.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: August 21, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Dudeck, Hans Diehm, Fritz Brunnmueller, Bernd Meissner, Werner Fliege
  • Patent number: 4021408
    Abstract: New bis-[4-(m,m'-di-tert.-butyl-p-hydroxyphenyl)-butyl-(2)] dicarboxylic acid esters which are starting materials for the manufacture of dyes, pesticides and additives for plastics, especially stabilizers for polyolefins and polyamides, and are themselves stabilizers, aging retardants or antioxidants for organic products.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: May 3, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Horn, Gernot Teege, Werner Fliege, Frank Weiss, Bernd Meissner