Patents by Inventor Otto Petersen

Otto Petersen 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).

  • Electrochemical detection of phosgene in gas mixtures
    Patent number: 4256543
    Abstract: An electrochemical cell having a polarographic device and preferably containing formamide as electrolyte is suitable for detecting very small quantities of phosgene in a gas mixture. Water, sodium acetate and thickener may be added to the electrolyte.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: March 17, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Petersen, Hans-Dieter Schmidt
  • Apparatus for detecting traces of a gas
    Patent number: 4235689
    Abstract: The measuring cell for detecting traces of nitrogen dioxide comprises a working electrode, preferably a silver mesh coated with silver iodide, an auxiliary and a reference electrode. The working electrode is an ion-selective electrode and cathodically polarized. If a reactor is preceded, in which the gas is oxidized by heating, other nitrogen containing gaseous substances, f. e. acrylonitrile and hydrocyanic acid, can also be detected very sensitively.
    Type: Grant
    Filed: March 13, 1979
    Date of Patent: November 25, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Petersen, Hans-Dieter Schmidt
  • Electrochemical cell having a polarographic device with ion selective electrode as working electrode and method of use
    Patent number: 4227974
    Abstract: The sensitivity and, especially, the selectivity of a polarographic device can be increased by using an ion selective electrode as the working electrode in the electrochemical cell. The cell is a high sensitivity gas detector which is reliable in operation and which is particularly suitable for use in the field of environmental protection. Especially silver/silver iodide electrodes used in various electrolytes are particularly suitable for detecting hydrocyanic acid, phosgene and hydrogen sulphide.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: October 14, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Petersen, Hans-Dieter Schmidt
  • Method of determining the mass of liquids
    Patent number: 4215091
    Abstract: A calibrated precision tube with an inlet and an outlet, and having a pressure transmitter at the bottom, is used for determining the mass of liquids.
    Type: Grant
    Filed: March 28, 1978
    Date of Patent: July 29, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Petersen, Franz Kersten
  • Electrochemical detection of phosgene in gas mixtures
    Patent number: 4200512
    Abstract: An electrochemical cell having a polarographic device and preferably containing formamide as electrolyte is suitable for detecting very small quantities of phosgene in a gas mixture. Water, sodium acetate and thickener may be added to the electrolyte.
    Type: Grant
    Filed: June 8, 1977
    Date of Patent: April 29, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Petersen, Hans-Dieter Schmidt
  • Electrochemical cell for detecting hydrogen sulphide in a gaseous mixture
    Patent number: 4149948
    Abstract: An electrochemical cell suitable for detecting traces of hydrogen sulphide in a gaseous mixture. Silver / silver sulphide electrodes are embedded in a polarographic arrangement in a gel-like electrolyte wherein the film adjacent to the auxiliary electrode contains a depolarizer. The gas detector is characterized by freedom from the need for maintenance and a high sensitivity which remains constant for a long period.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: April 17, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Petersen, Hans-Dieter Schmidt