Patents by Inventor Peter Herbrechtsmeier

Peter Herbrechtsmeier 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: 5132530
    Abstract: A light detector consists of a plate-like light-absorbing body and at least one optical waveguide connected thereto. Both parts of the light detector contain a fluorescent dye, whereby the irradiated light is converted into a fluorescence radiation. This radiation is guided by total reflection to a light-sensitive semiconductor element and is measured there. The light detector is suitable as light barrier, fiber-optic revolution counter or UV detector.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: July 21, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Werner Groh, Jochen Coutandin, Peter Herbrechtsmeier, Jurgen Theis
  • Patent number: 5129031
    Abstract: Optical waveguides of very good heat resistance and good light conductivity are composed of polymers which are derived from halogenated phenyl acrylates or phenyl methacrylates.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: July 7, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Wieners, Rudolf Heumuller, Jochen Coutandin, Werner Groh, Peter Herbrechtsmeier
  • Patent number: 5073314
    Abstract: Mechanically robust star couplers of polymer optical waveguides having low insertion losses and small fluctuations between the individual output fibers are obtained if polymer optical waveguides are arranged in parallel in the middle region of an apparatus and fused with one another under pressure and with the supply of heat. The optical cladding of the polymer optical waveguides has been previously removed. The method is easy and cost-effective. The apparatus is composed of a lower part with a channel recessed therein and an upper part with a male die located therein, which male die corresponds in its shape to the shape of the channel.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: December 17, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jochen Coutandin, Werner Groh, Peter Herbrechtsmeier, Jurgen Theis
  • Patent number: 5032654
    Abstract: A transparent material of very good heat resistance and very good light conductivity is essentially composed of a polymer derived mainly from bromophenyl acrylates or bromophenyl methacrylates.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: July 16, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Wieners, Rudolf Heumuller, Jochen Coutandin, Werner Groh, Peter Herbrechtsmeier
  • Patent number: 5030321
    Abstract: Channels in which polymeric optical waveguides can be laid can be milled in surfaces of plastic sheets by means of an excimer laser. The free space between the optical waveguides is filled up with a transparent casting resin.The channels produced by means of the laser are distinguished by high dimensional accuracy and low surface roughness.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: July 9, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jochen Coutandin, Werner Groh, Peter Herbrechtsmeier, Jurgen Theis
  • Patent number: 4991932
    Abstract: An optical waveguide having a core-sheath structure whose core comprises a terpolymer based on vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene, is suitable for transmission paths of ca. 10 to ca. 100 m and can also be used at a temperature of above 100.degree. C. without significant reduction of the transmission path.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: February 12, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Gerhard Wieners, Jurgen Kuhls, Herbert Fitz, Manfred Tschacher
  • Patent number: 4986630
    Abstract: An optical waveguide having a core/sheath structure whose sheath comprises a polysiloxane or a terpolymer based on vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene is suitable for transmission paths of ca. 10 to 100 m and can also be used at a temperature above 100.degree. C. without significant reduction of the transmission path.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: January 22, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Jurgen Theis, Gerhard Wieners
  • Patent number: 4984870
    Abstract: An optical waveguide having a core/sheath structure whose sheath comprises a polymer which is based on vinylidene fluoride and at least one other vinyl monomer containing fluorine and has been modified and crosslinked with a trisalkoxyvinylsilane, is suitable for transmission paths of ca. 10 to 100 m and can also be used at a temperature above 100.degree. C. without any significant reduction in the transmission path.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: January 15, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Gerhard Wieners, Jurgen Kuhls, Manfred Tschacher, Herbert Fitz
  • Patent number: 4979799
    Abstract: An optical waveguide having a core/sheath structure whose sheath comprises a terpolymer based on vinylidene fluoride, tetrafluoroethylene and hexafluorpropylene, is suitable for transmission paths of ca. 10 to 100 m and can also be used at a temperature of above 100.degree. C. without significant reduction of the transmission path.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: December 25, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Gerhard Wieners, Jurgen Kuhls, Manfred Tschacher, Herbert Fitz
  • Patent number: 4919851
    Abstract: High-efficiency optical couplers for polymer optical waveguides are obtained when optical waveguides are bundled and fused by means of a piece of plastic shrink sleeve, the plastic shrink sleeve being heated above the shrinkage temperature. The process is simple and cost-advantageous.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: April 24, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jochen Coutandin, Jurgen Theis, Werner Groh, Peter Herbrechtsmeier
  • Patent number: 4863236
    Abstract: Optical waveguides of plastic usually consist of a core and a jacket, the core material having a higher refractive index than the jacket material. A suitable core material is a fluorine-free polymer and a suitable jacket material is a fluorine-containing polymer, which can also contain deuterium. The optical waveguides can be produced by passing a polymer rod through a solution of the jacket polymer and then removing the solvent. The optical waveguides are particularly suitable for the transmission of data with the aid of light waves with a wavelength of 500 to 750 nm.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: September 5, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Manfred Fleissner, Werner Groh, Rudolf Heumuller, Gerhard Wieners
  • Patent number: 4552977
    Abstract: Process for the preparation of (phenoxy- or benzyl-)-phenoxypropionic acids and the alkali metal salts thereof by adding a double molar amount of an aqueous alkali hydroxide to a boiling mixture of a (benzyl- or phenoxy-)-phenol and 2-chloropropionic acid (ester), with simultaneous azeotropic distillation of the water introduced or formed in the reaction.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: November 12, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Manfred Koch, Peter Herbrechtsmeier
  • Patent number: 4377395
    Abstract: The invention provides a process for multistep gassing of liquids streaming downward in a gassing apparatus, which comprises using a gassing apparatus consisting of at least two superposed downstream parts, wherein the gas is fed in at the upper end of each downstream part, the gas bubbles are separated at the lower end of each downstream part and the separated gas bubbles are discharged to the outside.The invention provides furthermore a corresponding gassing apparatus.
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: March 22, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Hans Schafer, Rudolf Steiner
  • Patent number: 4370151
    Abstract: The invention provides a process for multistep gassing of liquids streaming downward in a gassing apparatus, which comprises using a gassing apparatus consisting of at least two superposed downstream parts, wherein the gas is fed in at the upper end of each downstream part and fresh gas is fed in exclusively at the upper end of the lowest downstream part, the gas bubbles are separated at the lower end of each downstream part and the separated gas bubbles are discharged to the outside and recycled to the next downstream part above.The invention provides furthermore a corresponding gassing apparatus.
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: January 25, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Hans Schafer, Rudolf Steiner
  • Patent number: 4353717
    Abstract: The invention relates to a process for absorbing ozone in water by introducing an ozone-containing gas into a water current streaming downward in an absorber, wherein the ozone-containing gas is introduced into the water current in the form of bubbles at the upper end of the absorber and subsequently conveyed downward to the absorber outlet in a direction opposed to its ascending direction.
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: October 12, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Gunter Greiner, Wolfgang Grunbein, Norbert Nix, Hans Schafer, Wolfgang Wendel
  • Patent number: 4309396
    Abstract: Nitric oxides can be absorbed from gas mixtures containing nitric oxides (NO and NO.sub.2) and oxygen by absorption with aqueous solutions. According to the invention, the absorption is effected in bubble columns, superficial velocities of 2 to 30 cm/second being maintained. It is advantageous to connect several bubble columns in series such that the gas and absorption liquid pass in counter-current to one another. In this embodiment, considerably less counter-current stages are required to achieve a high degree of absorption of NO.sub.x than in the case of conventional processes. At superficial velocities of 10 to 30 cm/second, large bubbles of gas can rapidly form from the gas introduced and can interact with the absorption liquid only with difficulty. In this case, gas distributor devices are incorporated in the bubble column. Since NO.sub.2 is more readily absorbed than NO, it is advantageous to connect flow reactors, in which NO.sub.2 is formed from NO and O.sub.2, upstream of the bubble columns.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: January 5, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Herbrechtsmeier, Rudolf Steiner, Herbert Vilcsek
  • Patent number: 4251505
    Abstract: Gas/liquid reactions are carried out in a downstream reactor in which the gas having a bubble diameter of 0.1 to 4 mm is injected into the liquid flowing downward at an empty tube velocity of 0.14 m/s to 0.5 m/s. The proportion by volume of liquid to gas should be greater than 8:1 and the residence time of the gas at least 6 second per meter of reactor length.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: February 17, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudolf Steiner, Peter Herbrechtsmeier