Patents Assigned to Hoechst Research & Technology
  • Patent number: 6372687
    Abstract: Supported catalysts having a high sintering stability and comprising one or more noble metal cluster carbonyl compounds of the formula (1) [HaMbNcLd(CO)x]n−An+ and their use for the dehydrogenation, hydrogenation and oxidation of organic compounds where M and N are, independently of one another, one or more metals selected from the group consisting of Pt, Rh, Ir, Os, Ru, Ag, Pd, Au, Ni, Fe, Co, Cu, Re, Mn; L is one or more neutral or anionic ligands which may be identical or different; (A)n+ is one or more cations which balance the charge of the complex; a is an integer from 0 to 10, preferably from 0 to 6; b is an integer from 2 to 60; c is an integer from 0 to 30; d is an integer from 0 to 60; x is an integer from 1 to 120; n is the total charge of the complex which results from the individual charges of the constituents and is greater than 0, wher
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: April 16, 2002
    Assignee: Hoechst Research & Technology
    Inventors: Alfred Hagemeyer, Harald Werner, Uwe Dingerdissen, Klaus Kühlein, John Meurig Thomas, Brian F. G. Johnson, D. S. Shephard, T. Maschmeyer
  • Patent number: 6312935
    Abstract: The invention relates to the isolation of the prepro form of cathepsin L, of its leader sequence, of cathepsin L and of the affiliated propeptide from ciliates, in particular Paramecium, to the use of these peptides and to a process for preparing cathepsin L from ciliates.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: November 6, 2001
    Assignees: Hoechst Research & Technology, Deutschland GmbH & Co. KG
    Inventors: Thomas Kiy, Joachim Schultz
  • Patent number: 6068959
    Abstract: This invention relates to a coated carrier for development of an electrostatically charged image, comprising carrier core particles coated with a coating resin; wherein the coating resin at least includes a polyolefin resin having a cyclic structure; a polyolefin resin of a cyclic structure having an intrinsic viscosity (i.v.) of 0.25 dl/g or more, a heat distortion temperature (HDT) by DIN53461-B of 70 .degree. C. or higher, and a number average molecular weight of 7,500 or more and a weight average molecular weight of 15,000 or more, as measured by GPC, is contained in an amount of less than 50% by weight based on the entire coating resin; and the coating resin is used for coating in an amount of 1 to 30% by weight based on the carrier core particles. The present invention can obtain a coated carrier which exhibits high anti-spent toner effect and excellent charge control properties during development with a dry toner.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: May 30, 2000
    Assignees: Hoechst Research & Technology, Deutschland GmbH & Co. KG
    Inventors: Toru Nakamura, Toshimi Nishioka, Takuya Hoga, Nobuyuki Kurokawa, Junichi Fukuzawa, Horst-Tore Land, Fredy Helmer-Metzmann