Patents by Inventor Ernst Schweizer

Ernst Schweizer 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: 5244322
    Abstract: A clamping device for individual tools has a spindle and a pulling member nnected inside the spindle. The pulling member has a conical clamping and centering element projection from the spindle. A tool holder has an end face with a recess, the recess having at least one conical mantle surface. The conical mantle surface cooperates with the conical clamping and centering element for clamping and centering the tool holder at the spindle.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: September 14, 1993
    Assignee: Gebr. Heller Maschinenfabrik Gesellschaft mit beschrankter Haftung
    Inventors: Ernst Schweizer, Horst Kalestra
  • Patent number: 4839379
    Abstract: 1-Phenyl-3-azabicyclo[3.1.0]hexane-2,4-diones of the formula ##STR1## wherein R.sub.1 is hydrogen, R.sub.2 is hydrogen, sulfo or acyl and R.sub.3 is hydrogen, or R.sub.1 is a saturated or unsaturated aliphatic, cycloaliphatic or cycloaliphatic-aliphatic carbon radical of up to and including 18, preferably of up to and including 12, carbon atoms, R.sub.2 is hydrogen, lower alkyl, sulfo or acyl and R.sub.3 is hydrogen or lower alkyl, and to salts thereof, and salts thereof, have valuable pharmacological properties and are effective aromatase inhibitors. They can therefore be used for the treatment of hormonal diseases, in particular mammary carcinomas.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: June 13, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Jaroslav Stanek, Ernst Schweizer
  • Patent number: 4649149
    Abstract: The invention relates to a process for the manufacture of novel benzazole derivatives of the formula I ##STR1## in which R.sub.1 represents an optionally 4-substituted piperazino group or a group of the formula R.sub.2 --alk--X.sub.2 --,R.sub.2 represents optionally esterified carboxy or represents hydroxymethyl,alk represents lower alkylene or lower alkylidene,X.sub.1 and X.sub.2, independently of one another, each represents oxygen or sulphur,Ph represents 1,2-phenylene optionally substituted as well as by the group R.sub.1 --C(.dbd.X.sub.1)--NH--,X.sub.3 represents oxygen, sulphur or optionally substituted imino, andR.sub.3 represents optionally fluorine-substituted lower alkyl or cycloalkyl,and their salts.The compounds of the formula I, which have proved to be excellent micro- and macrofilaricides and schistosomacides, are manufactured according to methods known per se.
    Type: Grant
    Filed: January 17, 1985
    Date of Patent: March 10, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: Jean-Jacques Gallay, Ernst Schweizer
  • Patent number: 4591597
    Abstract: The compounds of the formula ##STR1## in which R represents the radical of the formula ##STR2## in which R.sub.1 represents lower alkyl andeach of R.sub.2 and R.sub.3, independently of the other, represents hydrogen or lower alkyl,and salts thereof exhibit antidiabetic actions.
    Type: Grant
    Filed: March 28, 1984
    Date of Patent: May 27, 1986
    Assignee: Ciba-Geigy Corporation
    Inventor: Ernst Schweizer
  • Patent number: 4511567
    Abstract: The invention relates to a process for the manufacture of novel benzazole derivatives of the formula I ##STR1## in which R.sub.1 represents an optionally 4-substituted piperazino group or a group of the formula R.sub.2 --alk--X.sub.2 --,R.sub.2 represents optionally esterified carboxy or represents hydroxymethyl,alk represents lower alkylene or lower alkylidene,X.sub.1 and X.sub.2, independently of one another, each represents oxygen or sulphur,Ph represents 1,2-phenylene optionally substituted as well as by the group R.sub.1 --C(.dbd.X.sub.1)--NH--,X.sub.3 represents oxygen, sulphur or optionally substituted imino, andR.sub.3 represents optionally fluorine-substituted lower alkyl or cycloalkyl,and their salts.The compounds of the formula I, which have proved to be excellent micro- and macrofilaricides and schistosomacides, are manufactured according to methods known per se.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: April 16, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: Jean J. Gallay, Ernst Schweizer
  • Patent number: 4342764
    Abstract: The invention relates to guanidine derivatives, particularly to substituted guanidines of the formula ##STR1## having hypoglycaemic activity, for the oral treatment of hyperglycaemia in mammals, especially for the oral treatment of Diabetes mellitus.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: August 3, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Atso Ilvespaa, Jorg Frei, Ernst Schweizer
  • Patent number: 4161534
    Abstract: Novel hydroxylalkyl dithiocarbamate of the formula ##STR1## wherein R.sub.1 represents a phenyloxyphenyl or phenylaminophenyl radical which is unsubstituted or substituted by lower alkyl, halogen, trifluoromethyl, nitro and/or cyano, and alk represents lower alkylene, are useful as anthelmintic agents.
    Type: Grant
    Filed: January 6, 1978
    Date of Patent: July 17, 1979
    Assignee: Ciba-Geigy Corporation
    Inventor: Ernst Schweizer
  • Patent number: 4064265
    Abstract: The present invention relates to new dithiocarbamic acid esters having the formula ##STR1## wherein R.sub.1 represents a phenyloxyphenyl or phenylaminophenyl radical which is unsubstituted or substituted by lower alkyl, halogen, trifluoromethyl, nitro or cyano, R.sub.2 represents hydrogen or lower alkyl, and alk represents lower alkylidene or lower alkylene, and also to salts of compounds of the formula (I), wherein R.sub.2 represents hydrogen, with pharmaceutically acceptable bases. These new compounds possess a strong anthelminthic activity and are useful for the treatment of warm-blooded animals infected with parasitic helminths. A specific embodiment is the N-[4-(4-nitroanilino)-phenyl]-dithiocarbamic acid-(2-carboxyethyl)-ester.
    Type: Grant
    Filed: June 23, 1976
    Date of Patent: December 20, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Denis V. Varsanyi, Ernst Aufderhaar, Ernst Schweizer
  • Patent number: 3947441
    Abstract: Cpmpounds of the class of 5-substituted and 5,6-disubstituted 2-amino-4-(hydroxyamino) and 2,4-bis-(hydroxyamino)pyrimidines and their pharmaceutically acceptable acid addition salts possess valuable biological properties, in particular antibacterial and antimalarial activity and potentiate the action of antibacterial sulphanilamide derivatives. Specific embodiments are 2-amino-4-(hydroxyamino)-5-(3,4,5-trimethoxybenzyl)-pyrimidine, and 2-amino-4-(hydroxyamino)-5-(p-chlorophenyl)-6-ethyl pyrimidine and its hydrochloride.
    Type: Grant
    Filed: August 20, 1974
    Date of Patent: March 30, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Ernst Schweizer, Jorg Frei, Atso Ilvespaa
  • Patent number: 3941804
    Abstract: Compounds of the class of 1-heteroarylsulphonyl-2-imino-imidazolidines which are substituted in the 3-position by an aliphatic or cycloaliphatic hydrocarbon radical, especially a cycloalkyl radical, and their pharmaceutically acceptable acid addition salts have valuable pharmacological properties. In particular, they possess hypoglycaemic activity and can be used for the treatment of hyperglycaemia in mammals. A specific embodiment is 1-[5-(2-butyramido-ethyl)-2-thienylsulphonyl]-2-imino-5-cyclohexyl-imidazo lidine.
    Type: Grant
    Filed: July 15, 1974
    Date of Patent: March 2, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Atso Ilvespaa, Andre Gagneux, Ernst Schweizer, Jorg Frei