Patents by Inventor Andreas Greiner

Andreas Greiner 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: 6887269
    Abstract: An ophthalmologic implant for the prophylaxis or treatment of capsule opacification after implantation and completion of wound healing of a synthetic lens is described. This treatment can be repeated if necessary.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: May 3, 2005
    Inventors: Norbert Hampp, Walter Heitz, Andreas Greiner, Lutz Hesse
  • Publication number: 20040013819
    Abstract: The invention relates to oriented webs of meso- and nanotubes (hollow fibers) wherein the tubes or hollow fibers have an internal diameter of 10 nm to 50 &mgr;m and are preferentially oriented in one direction and to a process for their production.
    Type: Application
    Filed: April 28, 2003
    Publication date: January 22, 2004
    Inventors: Haoqing Hou, Johannes Averdung, Wolfgang Czado, Andreas Greiner, Joachim H. Wendorff
  • Patent number: 6667099
    Abstract: The invention relates to mesotubes and nanotubes (hollow fibers) having an inner diameter of 10 nm-50 &mgr;m and to a method for the production thereof. The hollow fibers can be produced by coating degradable materials with non-degradable materials, whereby the degradable materials are destroyed by thermal methods, for instance. The hollow fibers are used in separation technology, catalysis, micro-electronics, medical technology, material technology or in the clothing industry.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: December 23, 2003
    Assignee: Creavis Gesellschaft fuer Technologie und Innovation mbH
    Inventors: Andreas Greiner, Joachim Wendorff, Johannes Averdung, Michael Dröscher
  • Publication number: 20030098518
    Abstract: The present invention relates to a method for making shaped structures with internally coated cavities with an inside diameter in the nanometer to micrometer range and the shaped structure obtained thereby.
    Type: Application
    Filed: April 2, 2002
    Publication date: May 29, 2003
    Applicant: DE GUSSA AG
    Inventors: Johannes Averdung, Andreas Greiner, Joachim H. Wendorff, Haoquing Hou, Michael Bognitzki, Jung Zeng
  • Publication number: 20030026985
    Abstract: Hollow fibers having an internal diameter from 1 nm to 100 nm can be produced by coating degradable materials with nondegradable materials and then degrading the degradable materials. The hollow fibers are useful in separation technology, catalysis, microelectronics, medical technology, materials technology or the clothing industry.
    Type: Application
    Filed: July 15, 2002
    Publication date: February 6, 2003
    Applicant: CREAVIS GESELLSCHAFT F. TECHN. U. INNOVATION MBH
    Inventors: Andreas Greiner, Joachim H. Wendorff, Haoqing Hou, Jun Zeng, Dierk Landwehr, Johannes Averdung
  • Patent number: 5736596
    Abstract: A process for the production of a molding, fiber or film which can be caused to fluoresce by an electrical voltage which comprises using linear mixtures comprising a fluorescent dye from the perylene series and a thermoplastic polymer having a degree of crystallinity of less than 10%.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: April 7, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Heitz, Sylke Haremza, Andreas Greiner
  • Patent number: 5310858
    Abstract: The invention relates to a process for preparing compounds of the formula (I) ##STR1## by pyrolysis, where n is the degree of polymerization and is.gtoreq.2. For this purposes compounds of the formula (II)--R--CO--O--CH.sub.2 --Ar--CH.sub.2 --O--CO--R (II)are pyrolyzed in one stage under conditions resulting in cleavage of the ester bonds under a partial pressure of the esters of p.ltoreq.10 mbar at temperatures T.gtoreq.500.degree. C., with the formation of the corresponding derivatives of 1,4-dimethylene-2,5-cyclohexadiene, but without the latter being cleaved further in subsequent reactions. The polymers of p-xylylene formed by spontaneous polycondensation of the derivatives of 1,4-dimethylene-2,5-cyclohexadiene were then cooled, Ar and R have the following meanings:--Ar-- is a 1,4-phenylene radical or another C.sub.6 -C.sub.12 aromatic or heteroaromatic radical in which the bonds are in the para position or a comparable coaxial or antiparallel position;R-- is preferably branched or unbranched C.sub.1 -C.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: May 10, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Greiner, Peter Simon
  • Patent number: 5026804
    Abstract: Vinylene copolymers composed of recurrent structural units of formula I ##STR1## wherein Ar denotes an aromatic or heterocyclic group, R denotes an inert substituent and n stands for an integer with a value from 0-8 and processes for their preparation.
    Type: Grant
    Filed: February 1, 1990
    Date of Patent: June 25, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Heitz, Andreas Greiner
  • Patent number: 4950737
    Abstract: Vinylene copolymers composed of recurrent structural units of formula I ##STR1## wherein Ar denotes an aromatic or heterocyclic group, R denotes an inert substitutent and n stands for an integer with a value from 0-8 and processes for their preparation.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: August 21, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Heitz, Andreas Greiner
  • Patent number: 4946937
    Abstract: Vinylene copolymers composed of recurrent structural units of formula I ##STR1## wherein Ar denotes an aromatic or heterocyclic group, R denotes an inert substituent and n stands for an integer with a value from 0-8 and processes for their preparation.
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: August 7, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Heitz, Andreas Greiner