Patents by Inventor John F. Stephen

John F. Stephen 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: 4435586
    Abstract: A high yield process for the polyalkylation of hexitols and hexitol inner ethers is presented wherein aqueous dispersions of monoalkali metal alkoxides thereof in organic solvent are reacted with alkyl monohalides to first form the monoalkylated hexitols or hexitol inner ether and thereafter further alkylated by addition of reactants to form the completely alkylated derivative.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: March 6, 1984
    Inventors: Walter M. Kruse, John F. Stephen
  • Patent number: 4369316
    Abstract: Preparation of a compound of the following formula (I): ##STR1## wherein R.sup.1 is alkyl of 1 to 12 carbons, from the compound of the following formula (II): ##STR2## by the steps of coupling (II) with 3,4-dichlorobenzotrifluoride; reacting the --NH.sub.2 and COOH groups with a COX.sub.2 compound, X being a leaving group, to produce a heterocycle; opening the heterocycle with an alkanesulphonamide; and oxidizing the resultant --NH.sub.2 group to an --NO.sub.2 to yield a compound of formula (I). Novel intermediates are also described. Compounds of formula (I) are useful as selective pre- and post-emergent herbicides.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: January 18, 1983
    Assignee: ICI Americas Inc.
    Inventors: Walter M. Kruse, John F. Stephen
  • Patent number: 4314078
    Abstract: Preparation of a compound of the following formula (I): ##STR1## wherein R.sup.1 is alkyl of 1 to 12 carbons, from the compound of the following formula (II): ##STR2## by the steps of coupling (II) with 3,4-dichlorobenzotrifluoride; reacting the --NH.sub.2 and COOH groups with a COX.sub.2 compound, X being a leaving group, to produce a heterocycle; opening the heterocycle with an alkanesulphonamide; and oxidizing the resultant --NH.sub.2 group to an --NO.sub.2 to yield a compound of formula (I). Novel intermediates are also described. Compounds of formula (I) are useful as selective pre- and post-emergent herbicides.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: February 2, 1982
    Assignee: ICI Americas Inc.
    Inventors: Walter M. Kruse, John F. Stephen
  • Patent number: 4313000
    Abstract: The invention comprises the preparation of a compound of the following formula (I): ##STR1## wherein R.sup.1 is alkyl of 1 to 12 carbons, from the compound of the following formula (II): ##STR2## by the steps of coupling (II) with 3,4-dichlorobenzotrifluoride; reacting the --NH.sub.2 group with an XCOOR compound, X being a leaving group with R an organic moiety; oxidizing the --CH.sub.3 group to a --COOH group; cyclization to produce a heterocycle with loss --OR; opening the heterocycle with an alkanesulphonamide; and oxidizing the resultant --NH.sub.2 group to an NO.sub.2 to yield a compound of formula (I). Novel intermediates are also described. Compounds of formula (I) are useful as selective pre- and post-emergent herbicides.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: January 26, 1982
    Assignee: ICI Americas Inc.
    Inventors: Walter M. Kruse, John F. Stephen
  • Patent number: 4116930
    Abstract: Pyromellitic diimides of 3,5-dialkyl-4-hydroxyphenylsubstituted amines of this invention effectively stabilize organic materials against the effects of heat and oxygen. The diimides of this invention are prepared by reacting the appropriate 3,5-dialkyl-4-hydroxyphenylsubstituted amine with pyromellitic anhydride or pyromelletic diimide. An example of this class of stabilizer is N,N'-bis(3,5-di-t-butyl-4-hydroxyphenyl)pyromellitic diimide.
    Type: Grant
    Filed: September 14, 1976
    Date of Patent: September 26, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Martin Dexter, Martin Knell, Peter Klemchuk, John F. Stephen
  • Patent number: 4104043
    Abstract: A new series of substituted esters of 3-hydroxyindone compounds have been found to have exceptional miticidal and herbicidal activity.
    Type: Grant
    Filed: December 12, 1972
    Date of Patent: August 1, 1978
    Assignee: Union Carbide Corporation
    Inventors: John A. Durden, Jr., Anthony A. Sousa, John F. Stephen
  • Patent number: 4093586
    Abstract: Compounds having the formula ##STR1## wherein X is alkyl, hydrogen, hydroxyl, oxygen radical, alkenyl, CH.sub.2 CH.sub.2 OCH.sub.3 or CH.sub.2 C.tbd.CH;R.sup.1 is alkyl or phenethyl; andR.sup.2 is alkyl,Are good light stabilizers. These compounds are prepared for example, from acetonlyacetone, an appropriate amine hydrochloride and sodium cyanide to give N-substituted 2,5-dimethyl-2,5-dicyanopyrrolidines which are coverted by standard techniques to the corresponding dicarboxylic acid. These esters are prepared by alkylation of appropriate alkali metal salts.
    Type: Grant
    Filed: March 18, 1976
    Date of Patent: June 6, 1978
    Assignee: Ciba-Geigy Corporation
    Inventor: John F. Stephen
  • Patent number: 4091006
    Abstract: A new series of substituted esters of 3-hydroxyindone compounds have been found to have exceptional miticidal and herbicidal activity.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: May 23, 1978
    Assignee: Union Carbide Corporation
    Inventors: John A. Durden, Jr., Anthony A. Sousa, John F. Stephen
  • Patent number: 4077941
    Abstract: Compounds having the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 are alkyl, cycloalkyl, phenyl, alkyl substituted phenyl, benzyl or alkyl substituted benzyl,R.sub.3 and R.sub.4 are both independently hydrogen or lower alkyl,M is a metal, andn is a value of from 1 to 4,Are good light stabilizers. The metal salts of this invention are prepared by reacting the appropriate amino acid or its alkali metal salt with a reactive form of the metal or metal complex.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: March 7, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: John F. Stephen, John D. Spivack
  • Patent number: 4045404
    Abstract: Compounds having the formula ##STR1## wherein R.sup.1 and R.sup.2 are lower alkyl, R.sup.3 is alkyl, another hindered phenolic norbornane-2,3-dicarboximide group, or a group --(CH.sub.2)--CO.sub.2 R.sup.4 and m is 0 to 3, n is 1 or 2 and R.sup.4 is alkyl, are good oxidative and thermal stabilizers of synthetic polymers.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: August 30, 1977
    Assignee: Ciba-Geigy Corporation
    Inventor: John F. Stephen
  • Patent number: 4000112
    Abstract: The 9-thiabicyclononane derivatives have the formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently tertiary alkyl of 4 to 8 carbon atoms or .alpha.,.alpha.-dimethylbenzyl, and n is 0 to 2.The 9-thiabicyclononanes are prepared by reacting an alkali salt of 2,6-di-tert-alkylphenols with 2,6-dichloro-9-thiabicylo[3.3.1]nonane in a dipolar aprotic solvent. The sulfoxide and sulfones are prepared from the sulfides by oxidation with peracids.The compounds are useful as stabilizers for organic materials, particularly turbine oils and polyolefins, subject to oxidative degradation.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: December 28, 1976
    Assignee: Ciba-Geigy Corporation
    Inventor: John F. Stephen
  • Patent number: 4000113
    Abstract: Compounds having the formula ##STR1## whereinR.sup.1 is hydrogen, alkyl or benzyl andR.sup.2 is alkyl, benzyl or a hindered phenolic group are good light stabilizers and antioxidants. These compounds are prepared by reacting 2,6-dihydroxy-9-azabicyclo[3.3.1]nonane with an appropriate carboxylic acid.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: December 28, 1976
    Assignee: Ciba-Geigy Corporation
    Inventor: John F. Stephen
  • Patent number: 3956361
    Abstract: Compounds having the formula ##SPC1##Wherein R.sub.1 and R.sub.2 are independently the same or different alkyl groups of 1 to 8 carbon atoms, cycloalkyl of 5 to 6 carbon atoms or one of R.sub.1 and R.sub.2 is hydrogen, R.sub.3 is hydrogen or lower alkyl of 1 to 6 carbon atoms, R.sub.4 is hydrogen or a group ##SPC2##m is 1 to 6, n is 0 to 2 and x is 1 to 2 are good thermal and oxidative stabilizers for synthetic polymers.
    Type: Grant
    Filed: May 23, 1974
    Date of Patent: May 11, 1976
    Assignee: Ciba-Geigy Corporation
    Inventor: John F. Stephen
  • Patent number: 3941746
    Abstract: Compounds having the formula ##SPC1##Wherein R.sup.1 and R.sup.2 are lower alkyl, X and Y are hydrogen or, when taken together, they form a bond or an ether linkage, m is 0 to 3, and n is 0 to 2, are good ultraviolet light stabilizers for synthetic polymers.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: March 2, 1976
    Assignee: Ciba-Geigy Corporation
    Inventor: John F. Stephen