Patents by Inventor Charles F. Weidig

Charles F. Weidig 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: 4861914
    Abstract: Substituted aromatic amines or mixtures thereof containing a discoloration inhibiting amount of a substituted phenol having the structure: ##STR1## or mixtures of such substituted phenols wherein R.sub.1 and R.sub.2 are independently selected alkyl, cycloalkyl, aryl, aralkyl, or alkaryl and p is 0 to 4.A method and composition are provided for inhibiting discoloration of alkylated aromatic amines and diamines. A minor portion of the substituted phenol is combined with a fresh, water white substituted aromatic amine of structure ##STR2## or mixtures thereof wherein m is 1 or 2, n is 1 to 5, m+n is not greater than 6, and the R are independently selected alkyl, cycloalkyl, aryl, aralkyl or alkaryl, said amine being subject to gradual discoloration, and a minor amount by weight of a substituted phenol or mixture of substituted phenols to inhibit color degradation.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: August 29, 1989
    Assignee: Ethyl Corporation
    Inventor: Charles F. Weidig
  • Patent number: 4524222
    Abstract: Dinitro alkyl phenols are produced free of tar when the precursor orthoalkylphenol is contacted with a molecular sieve prior to sulfonation, nitration, and air drying. The dinitro alkylphenols produced are free of tars or similar resins and avoid processing problems that are shown in impure prior art products.
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: June 18, 1985
    Assignee: Ethyl Corporation
    Inventor: Charles F. Weidig
  • Patent number: 4448586
    Abstract: Liquid fuels having anti-corrosion properties for use in internal combustion engines comprising (i) a major fraction of a monohydroxy alkanol having from 1 to about 5 carbon atoms, and (ii) a corrosion inhibiting amount of a mixture of (a) from about 5 to 95 parts of an alkyl or alkenyl succinic acid and an ester formed from that acid, or from a related alkyl or alkenyl succinic acid, and a glycol of 2 to 4 carbon atoms wherein the alkyl or alkenyl groups in the acid and in the ester each contain about 8 to 30 carbon atoms, and (b) from about 95 to 5 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having about 16 to 18 carbon atoms per molecule.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: May 15, 1984
    Assignee: Ethyl Corporation
    Inventor: Charles F. Weidig
  • Patent number: 4440545
    Abstract: Liquid fuels for use in internal combustion engines comprising (i) a major fraction of hydrocarbons boiling in the gasoline boiling range, (ii) a minor amount of ethanol, and (iii) a corrosion inhibiting amount of a hydrocarbyl succinic acid or anhydride having from about 8 to 30 carbon atoms.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: April 3, 1984
    Assignee: Ethyl Corporation
    Inventor: Charles F. Weidig