Patents by Inventor Werner Fritsch

Werner Fritsch 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: 6313617
    Abstract: The present invention relates to a method and apparatus for reducing voltage sags in the battery supply lines of the circuit arrangement which is used to regulate or control the current input of a consumer in an automotive vehicle, wherein the consumer current is regulated or controlled by pulse-width modulation (PWM) and a controllable switch is used. To this end, a circuit is used which influences the edges of a pulse-width modulated signal, and a signal representative of the rate of change in the current in the battery supply lines to the consumer is produced. This signal is fed back to the input signal by way of a capacitor.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: November 6, 2001
    Assignee: Continental Teves AG & Co., oHG
    Inventors: Mario Engelmann, Tibor Toth, Werner Fritsch
  • Patent number: 4377575
    Abstract: What is disclosed are steroid-21-halogeno-17-(alkyl carbonates), useful as medicaments for the treatment of inflammatory dermatoses, and a method for making them.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: March 22, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ulrich Stache, Werner Fritsch, Hans G. Alpermann, Jurgen K. Sandow
  • Patent number: 4242334
    Abstract: What is disclosed is corticoid 17-(alkyl carbonates) of the formula ##STR1## as defined in the specification, which compounds can be used in veterinary therapy and human therapy, in the form of suspensions, ointments, creams, sprays and the like, for the treatment of inflammatory dermatoses of very diverse cause.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: December 30, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ulrich Stache, Werner Fritsch, Hans G. Alpermann
  • Patent number: 4223841
    Abstract: An arrangement for washing lenses of headlights has means for conveying a washing liquid, and a nozzle provided with a passage having an inlet portion communicating with the conveying means for admitting the washing liquid into the nozzle and an outlet portion having an open end for issuing the washing liquid from the nozzle. The outlet portion of the passage of the nozzle diverges towards the open end thereof, whereas the open end has a shape such that the flow of the washing liquid issuing from the nozzle has a shape corresponding to the shape of the lens to be washed. The outlet portion of the passage of the nozzle may be formed as a through bore open at an end face of the nozzle facing towards the lens to be washed, and the open end of the thus-formed outlet portion may have a shape corresponding to the shape of the lens. The outlet portion of the passage of the nozzle may also be defined by two grooves formed in a section of the nozzle adjacent to the end face thereof and open at the latter.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: September 23, 1980
    Assignee: Robert Bosch GmbH
    Inventors: Gotthilf Schaller, Eckhard Ursel, Werner Fritsch, Horst Seibicke, Wolfgang Dostler
  • Patent number: 4191765
    Abstract: Compounds of formula I ##STR1## wherein R.sup.1 and R.sup.1' are identical or different and represent hydrogen, an alkyl radical or alkoxy radical having 1-4 carbon atoms, the allyl group, a halogen atom or the nitro group, R.sup.2 represents an acrylic acid radical or an acrylic acid nitrile radical of the formulae ##STR2## wherein R.sup.5 represents hydrogen, an alkyl radical having 1-5 carbon atoms, an aryl radical or aryl-lower alkyl radical either unsubstituted or substituted by lower alkyl or alkoxy, R.sup.6 represents hydrogen or an alkyl radical having 1-8 carbon atoms, R.sup.7 represents hydrogen, a lower alkyl radical or an aryl-lower alkyl radical, R.sup.3 and R.sup.4 represent together with the nitrogen atom a heterocyclic ring with 5-7 members being optionally substituted by C.sub.1 -C.sub.4 alkyl, in which ring one carbon atom may be replaced by one oxygen atom, sulfur atom or one further nitrogen atom, the latter may be substituted, or wherein R.sup.3 represents hydrogen and R.sup.
    Type: Grant
    Filed: August 10, 1978
    Date of Patent: March 4, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Werner Fritsch, Ulrich Stache, Ernst Lindner
  • Patent number: 4115685
    Abstract: Tubes, rods, etc., are heated electrically in that current is applied via movable electrodes, one of which tracks the front and another one tracks the rear ends, but the electrodes remain spaced-apart during most of the heating.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: September 19, 1978
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Friedrich-Hans Grandin, Werner Fritsch, Gunter Wengenrod
  • Patent number: 4003997
    Abstract: Cyclic 2',3'-ethers of 3-hydroxy-14,15.beta.-oxido-14.beta.-bufa-4,20,22-trienolide, 3.beta.-(.alpha.-L-rhamnopyranoside) and process for preparing them. The compounds have a strongly positive inotropic activity and may be used in the therapy of cardiac insufficiency.
    Type: Grant
    Filed: August 12, 1974
    Date of Patent: January 18, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ulrich Stache, Kurt Radscheit, Werner Fritsch, Werner Haede, Ernst Lindner
  • Patent number: 3950323
    Abstract: Digoxigenine-3-[2', 3'-didesoxy-glycosides] of the formula ##SPC1##In which R.sup.1 is the digoxigenine radical and R.sup.2 is hydrogen, methyl or --CH.sub.2 OH, which are prepared by a reaction of a digoxigenine-12-monoacylate with an acylated 1,2-glycal, a catalytic hydrogenation of the 12-acylates obtained and a subsequent hydrolysis. The products have a cardiotonic, diuretic and especially venotonic activity.
    Type: Grant
    Filed: November 16, 1973
    Date of Patent: April 13, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ulrich Stache, Werner Fritsch, Werner Haede, Ernst Lindner
  • Patent number: 3937697
    Abstract: 12-Dehydro digoxin mono-4'" and 3'"-alkyl ethers and a process for their manufacture.The compounds have a cardiotonic and diuretic activity.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: February 10, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ulrich Stache, Werner Fritsch, Werner Haede, Ernest Lindner