Patents by Inventor Janet B. Peterson

Janet B. Peterson 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).

  • Hydroxyphenylated hydantoins
    Patent number: 4128718
    Abstract: New hydroxyphenylated hydantoins are useful as stabilizers for synthetic organic polymeric materials. The new hydroxyphenylated hydantoins may be additionally substituted in the 1,3 and/or 5 positions of the hydantoin ring.The hydroxyphenylated and 5-substituted hydroxyphenylated hydantoins are generally prepared by reacting hydroxphenylated ketones or aldehydes with alkali cyanide and ammonium carbonate. Hydroxyphenylated hydantoins substituted in the 1 and/or 3 positions are generally prepared by reacting the 1 and/or 3-unsubstituted hydroxyphenylated hydantoins with the corresponding halogen or dialkylaminomethyl derivatives.
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: December 5, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Andreas Schmidt, Janet B. Peterson, Martin Dexter
  • Hydroxyphenylated hydantoins
    Patent number: 4044019
    Abstract: New hydroxyphenylated hydantoins are useful as stabilizers for synthetic organic polymeric materials. The new hydroxyphenylated hydantoins may be additionally substituted in the 1,3 and/or 5 positions of the hydantoin ring.The hydroxyphenylated and 5-substituted hydroxyphenylated hydantoins are generally prepared by reacting hydroxyphenylated ketones or aldehydes with alkali cyanide and ammonium carbonate. Hydroxyphenylated hydantoins substituted in the 1 and/or 3 positions are generally prepared by reacting the 1 and/or 3-unsubstituted hydroxyphenylated hydantoins with the corresponding halogen or dialkylaminomethyl derivatives.
    Type: Grant
    Filed: September 17, 1975
    Date of Patent: August 23, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Andreas Schmidt, Janet B. Peterson, Martin Dexter
  • Fat compositions stabilized with esters of fatty acids and tertiary lower alkyl substituted hydroquinones and method therefrom
    Patent number: 3969383
    Abstract: Fats, especially edible oils of animal and vegetable origin, are stabilized against oxidative and/or thermal deterioration by addition of from 0.001% to about 0.1% by weight of a compound of the formula: ##SPC1##Wherein R.sub.1 is alkyl of 1 to 8 carbon atoms, R.sub.2 is tertiary alkyl of 4 to 8 carbon atoms, and R.sub.3 is alkyl of 11 to 21 carbon atoms. An example of the above stabilizer compound is 3-t-butyl-4-hydroxy-5-methylphenyl stearate.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: July 13, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Martin Dexter, Janet B. Peterson
  • Hydroxyphenylated hydantoins
    Patent number: 3939175
    Abstract: New hydroxyphenylated hydantoins are useful as stabilizers for synthetic organic polymeric materials. The new hydroxyphenylated hydantoins may be additionally substituted in the 1,3 and/or 5 positions of the hydantoin ring.The hydroxyphenylated and 5-substituted hydroxyphenylated hydantoins are generally prepared by reacting hydroxyphenylated ketones or aldehydes with alkali cyanide and ammonium carbonate. Hydroxyphenylated hydantoins substituted in the 1 and/or 3 positions are generally prepared by reacting the 1 and/or 3-unsubstituted hydroxyphenylated hydantoins with the corresponding halogen or dialkylaminomethyl derivatives.
    Type: Grant
    Filed: May 14, 1974
    Date of Patent: February 17, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Andreas Schmidt, Janet B. Peterson, Martin Dexter