Patents by Inventor Norbert Breitkopf

Norbert Breitkopf 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).

  • Moisture sensing and indicating system
    Patent number: 6756521
    Abstract: A moisture sensing and indicating system for signaling to a caretaker that a diaper has moisture therein. The moisture sensing and indicating system includes a casing having a plurality of apertures therein for accessing an interior of the casing. The casing is positioned between absorbent material and watertight material of a diaper. A sensor for detecting moisture is positioned in the casing. Moisture actuates the sensor by completing a circuit. A transmitter for transmitting a signal is positioned in the casing and operationally coupled to the sensor. A housing has a top wall, a bottom wall and a peripheral wall extending between integrally coupled to the top and bottom walls. The top wall has a plurality of openings therein. A receiver for receiving a signal from the transmitter is positioned in the housing. A speaker for emitting a sound is securely positioned in the housing and traverses the openings in the top wall. The speaker is operationally coupled to the receiver.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: June 29, 2004
    Inventor: Norbert Breitkopf
  • Process for purifying propanediol-1,3
    Patent number: 5008473
    Abstract: A process for the purification of propanediol-1,3, especially when produced by hydration of acrolein with water, including extracting the diol with cyclohexane. Preferably, from 2 to 10 parts by weight of cyclohexane per part by weight of diol is used. The purification is usually carried out below 60.degree. C.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: April 16, 1991
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Norbert Breitkopf, Georg Dambkes, Hanswilhelm Bach
  • Process for the preparation of 2,2-dimethylpropanediol-1,3
    Patent number: 4918247
    Abstract: Preparation of 2,2-dimethylpropanediol-1,3 by the aldol addition of isobutyraldehyde and formaldehyde using tri-n-propylamine as a catalyst, followed by hydrogenation of the reaction mixture, and subsequent distillation of the hydrogenation product in the presence of isobutanol and water.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: April 17, 1990
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Norbert Breitkopf, Wolfgang Hofs, Heinz Kalbfell, Franz Thonnessen, Peter Lappe, Helmut Springer
  • Method for purifying N,N-dimethylaminopropylamine
    Patent number: 4532354
    Abstract: The present invention relates to a method for purifying N,N-dimethylaminopropylamine containing 1,3-diaminopropane as an impurity. Dimethylaminopropionitrile is formed by adding dimethylamine to acrylonitrile, and is then converted by subsequent hydrogenation and distillation into N,N-dimethylaminopropylamine. The impurity 1,3-diaminopropane is removed by adding a metal salt of a transition element which forms a stable complex with the 1,3-diaminopropane.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: July 30, 1985
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Boy Cornils, Ernst Wiebus, Norbert Breitkopf