Patents by Inventor George E. Stead

George E. Stead 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: 4665268
    Abstract: A process is disclosed for converting a methanol-containing feed to a light olefin-containing product over a ZSM-12 zeolite catalyst, preferably modified by incorporation of either magnesium, manganese or both magnesium and manganese. By using such Mg and/or Mn-modified ZSM-12 zeolite catalysts, methanol and/or methyl ether can be converted to an olefin-containing hydrocarbon product enriched in C.sub.2 to C.sub.4 olefins and especially enriched in the particular light olefin propylene.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: May 12, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Carol S. Lee, George E. Stead
  • Patent number: 4405818
    Abstract: Organic compound mixtures enriched in meta-isopropylphenol are prepared by alkylating phenol with isopropanol or propylene to form mixtures of isopropylphenol isomers and by subsequently selectively cracking the para-isopropylphenol isomer from such a mixture over a ZSM-5 type cracking catalyst. Concentration of the para-isomer is thereby selectively reduced relative to the meta-isomer and the meta-isopropylphenol isomer can be further separated from the remaining mixture by fractionation procedures.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: September 20, 1983
    Assignee: Mobil Oil Corporation
    Inventors: George E. Stead, Lewis B. Young
  • Patent number: 4177192
    Abstract: Succinimides of aminoaryl sulfonic acid salts provide exceptional detergency, viscosity control and anticorrosion properties to lubricants and greases and to other fluid compositions useful in hydraulic systems. Ammonium, alkylammonium, alkali metal, alkaline earth metal and groups IB, IIB, VIB, VIIB, VIII metal salts of aminoaryl sulfonic acid salts, and the salts of sulfanilic acid in particular, can be reacted with alkenyl or alkylsuccinic anhydride, acid or ester, in which the alkenyl or alkyl group may contain from 8 to about 500 carbon atoms, to yield the products of this invention. These products are understood to be novel. Suitable modifications of the aforementioned are the succinimides of di(aminoaryl sulfonic acid) salts, aniline disulfonic acid salts and corresponding aminonaphthalene sulfonate salts which are also useful in the compositions of this invention.
    Type: Grant
    Filed: April 22, 1977
    Date of Patent: December 4, 1979
    Assignee: Mobil Oil Corporation
    Inventors: El-Ahmadi I. Heiba, Robert E. Kinney, George E. Stead
  • Patent number: 4053425
    Abstract: Succinimides of aminoaryl sulfonic acid salts provide exceptional detergency, viscosity control and anticorrosion properties to lubricants and greases and to other fluid compositions useful in hydraulic systems. Ammonium, alkylammonium, alkali metal, alkaline earth metal and groups IB, IIB, VIB, VIIB, VIII metal salts of aminoaryl sulfonic acid salts, and the salts of sulfanilic acid in particular, can be reacted with alkenyl or alkylsuccinic anhydride, acid or ester, in which the alkenyl or alkyl group may contain from 8 to about 500 carbon atoms, to yield the products of this invention. These products are understood to be novel. Suitable modifications of the aforementioned are the succinimides of di(aminoaryl sulfonic acid) salts, aniline disulfonic acid salts and corresponding aminonaphthalene sulfonate salts which are also useful in the compositions of this invention.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: October 11, 1977
    Assignee: Mobil Oil Corporation
    Inventors: El-Ahmadi I. Heiba, Robert E. Kinney, George E. Stead