Patents by Inventor Olaf Schaefer

Olaf Schaefer 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: 10323040
    Abstract: The present invention relates to a process for the preparation of 5-fluorotryptophol as well as a process for the preparation of (1r,4r)-6?-fluoro-N,N-dimethyl-4-phenyl-4?,9?-dihydro-3?H-spiro[cyclohexane-1,1?-pyrano-[3,4b]-indol]-4-amine using the 5-fluorotryptophol obtained by said first process. The process according to the invention provides 5-fluorotryptophol in improved yield and purity without the need for chromatographic purification of the product.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: June 18, 2019
    Assignee: GRUENENTHAL GMBH
    Inventors: Stefan Pruehs, Olaf Schaefer
  • Publication number: 20160362417
    Abstract: The present invention relates to a process for the preparation of 5-fluorotryptophol as well as a process for the preparation of (1r,4r)-6?-fluoro-N,N-dimethyl-4-phenyl-4?,9?-dihydro-3?H-spiro[cyclohexane-1,1?-pyrano-[3,4b]-indol]-4-amine using the 5-fluorotryptophol obtained by said first process. The process according to the invention provides 5-fluorotryptophol in improved yield and purity without the need for chromatographic purification of the product.
    Type: Application
    Filed: August 26, 2016
    Publication date: December 15, 2016
    Inventors: Stefan PRUEHS, Olaf SCHAEFER
  • Patent number: 8470776
    Abstract: The present invention provides conjugates of disorazoles and their derivatives with cell-binding molecules, such as peptides, proteins, hormones, blood proteins and antibodies. The present invention further provides novel disorazole derivatives and processes of manufacturing such conjugates and disorazole derivatives. These compounds can be used as medicaments for the treatment of physiological and/or pathophysiological conditions in mammals, in particular for the treatment of various tumors.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: June 25, 2013
    Assignee: Aeterna Zentaris GmbH
    Inventors: Eckhard Guenther, Olaf Schaefer, Michael Teifel, Klaus Paulini
  • Patent number: 7858826
    Abstract: A process for producing 6-dimethylaminomethyl-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-1,3-diols from 6-dimethylaminomethyl-1-hydroxy-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-3-ones by catalytic hydrogenation in the presence of heterogeneous or homogeneous catalysts, or by using metal hydrides.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: December 28, 2010
    Assignee: Gruenenthal GmbH
    Inventors: Wolfgang Hell, Oswald Zimmer, Markus Kegel, Olaf Schaefer, Felix Spindler, Anita Schnyder, Urs Siegrist, Detlef Heller, Hans-Joachim Drexler
  • Publication number: 20100323963
    Abstract: The present invention provides conjugates of disorazoles and their derivatives with cell-binding molecules, such as peptides, proteins, hormones, blood proteins and antibodies. The present invention further provides novel disorazole derivatives and processes of manufacturing such conjugates and disorazole derivatives. These compounds can be used as medicaments for the treatment of physiological and/or pathophysiological conditions in mammals, in particular for the treatment of various tumors.
    Type: Application
    Filed: March 19, 2010
    Publication date: December 23, 2010
    Applicant: AETERNA ZENTARIS GmbH
    Inventors: Eckhard GUENTHER, Olaf Schaefer, Michael Teifel, Klaus Paulini
  • Publication number: 20100317580
    Abstract: The present invention provides conjugates of disorazoles and their derivatives with cell-binding molecules, such as peptides, proteins, hormones, blood proteins and antibodies. The present invention further provides novel disorazole derivatives and processes of manufacturing such conjugates and disorazole derivatives. These compounds can be used as medicaments for the treatment of physiological and/or pathophysiological conditions in mammals, in particular for the treatment of various tumors.
    Type: Application
    Filed: March 19, 2010
    Publication date: December 16, 2010
    Applicant: AETERNA ZENTARIS GmbH
    Inventors: Eckhard GUENTHER, Olaf Schaefer, Michael Teifel, Klaus Paulini
  • Patent number: 7741277
    Abstract: The present invention provides conjugates of disorazoles and their derivatives with cell-binding molecules, such as peptides, proteins, hormones, blood proteins and antibodies. The present invention further provides novel disorazole derivatives and processes of manufacturing such conjugates and disorazole derivatives. These compounds can be used as medicaments for the treatment of physiological and/or pathophysiological conditions in mammals, in particular for the treatment of various tumors.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: June 22, 2010
    Assignee: Aeterna Zentaris GmbH
    Inventors: Eckhard Guenther, Olaf Schaefer, Michael Teifel, Klaus Paulini
  • Publication number: 20090227813
    Abstract: A process for producing 6-dimethylaminomethyl-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-1,3-diols from 6-dimethylaminomethyl-1-hydroxy-1-(3-hydroxy- or 3-C1-C4 alkoxyphenyl)-cyclohexane-3-ones by catalytic hydrogenation in the presence of heterogeneous or homogeneous catalysts, or by using metal hydrides.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 10, 2009
    Applicant: Gruenenthal GmbH
    Inventors: Wolfgang Hell, Oswald Zimmer, Markus Kegel, Olaf Schaefer, Felix Spindler, Anita Schnyder, Urs Siegrist, Detlef Heller, Hans-Joachim Drexler
  • Publication number: 20080090758
    Abstract: The present invention provides conjugates of disorazoles and their derivatives with cell-binding molecules, such as peptides, proteins, hormones, blood proteins and antibodies. The present invention further provides novel disorazole derivatives and processes of manufacturing such conjugates and disorazole derivatives. These compounds can be used as medicaments for the treatment of physiological and/or pathophysiological conditions in mammals, in particular for the treatment of various tumors.
    Type: Application
    Filed: September 6, 2007
    Publication date: April 17, 2008
    Applicant: AETERNA ZENTARIS GmbH
    Inventors: Eckhard Guenther, Olaf Schaefer, Michael Teifel, Klaus Paulini
  • Publication number: 20070276032
    Abstract: The invention provides a production method for the phytoestrogen 8-Prenylnaringenin, the preparation produced by this method and the use of 8-Prenylnaringenin for the production of a medicament for the prevention and treatment of hormone-dependent osteoporosis and of peri- and postmenopausal symptoms in women.
    Type: Application
    Filed: October 6, 2004
    Publication date: November 29, 2007
    Inventors: Michael Huempel, Wolf-Dieter Schleuning, Olaf Schaefer, Paivi Isaksson, Rolf Bohlmann
  • Patent number: 6152593
    Abstract: A capsule holder for retaining a mixing capsule on a rotary mixing device includes a carrier plate 10, an actuator disk 11 rotatable relative to the plate, and two retaining arms 12, 13 for clamping the capsule from opposite sides, the retaining arms having driving pins 22 engaging spiral cam slots 26 of the actuator disk 11. By rotating the actuator disk 11, the retaining arms 12, 13 are moved away from, or toward, each other. The thus constituted gearing is self-locking in one direction of force transmission so that centrifugal forces exerted on the retaining arms 12, 13 during rotation cannot move the arms apart. On the other hand, the retaining arms 12, 13 are opened with little effort by rotating the actuator disk 11.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: November 28, 2000
    Assignee: ESPE Dental AG
    Inventors: Olaf Schaefer, Werner Lissner
  • Patent number: 6010240
    Abstract: A capsule holder for retaining a mixing capsule on a rotary mixing device includes a carrier plate 10, an actuator disk 11 rotatable relative to the plate, and two retaining arms 12, 13 for clamping the capsule from opposite sides, the retaining arms having driving pins 22 engaging spiral cam slots 26 of the actuator disk 11. By rotating the actuator disk 11, the retaining arms 12, 13 are moved away from, or toward, each other. The thus constituted gearing is self-locking in one direction of force transmission so that centrifugal forces exerted on the retaining arms 12, 13 during rotation cannot move the arms apart. On the other hand, the retaining arms 12, 13 are opened with little effort by rotating the actuator disk 11.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: January 4, 2000
    Assignee: ESPE Dental AG
    Inventors: Olaf Schaefer, Werner Lissner