Patents by Inventor Steven Roman

Steven Roman 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).

  • Oxabicycloalkane herbicides
    Patent number: 4542244
    Abstract: Certain substituted 3-cyclohexene-1-ol are intermediates to herbicides and plant growth.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: September 17, 1985
    Assignee: Shell Oil Company
    Inventors: George B. Payne, Samuel B. Soloway, James E. Powell, Steven A. Roman, Willy D. Kollmeyer
  • Cyclopropanecarboxylate pesticides and their preparation
    Patent number: 4518797
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an acyl group or certain optionally halo-substituted hydrocarbyl groups, and X is --CH.sub.2 CH(OCH.sub.3).sub.2, --CH.sub.2 CHO, --CH.dbd.CHOR.sup.2 in which R.sup.2 is acyl, --CHO,--C(O)Cl, --C(O)Br or --C(O)OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the natural terpene, 3-carene.
    Type: Grant
    Filed: March 15, 1979
    Date of Patent: May 21, 1985
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Use of pyrroloquinazolinediamines as pesticides
    Patent number: 4451466
    Abstract: Certain 7H-pyrrolo[3,2-f]quinazoline-1,3-diamines are useful as pesticides.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: May 29, 1984
    Assignee: Shell Oil Company
    Inventors: Charles A. Horne, Stephen A. Salvo, Kurt G. R. Sundelin, Steven A. Roman
  • Preparation of (1R,cis)-oxyimino-substituted cyclopropanecarboxylic acids
    Patent number: 4448986
    Abstract: (1R,cis)-Oxyimino-substituted cyclopropanecarboxylic acids are prepared via a (1R,4R,5S)-2-acetoxy-6,6-dimethyl-4-oxo-3-oxabicyclo[3.1.0]hexane intermediate.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: May 15, 1984
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Preparation of (1R, cis)-oxyimino-substituted cyclo-propanecarboxylic acids
    Patent number: 4409398
    Abstract: (1R,cis)-Oxyimino-substituted cyclopropanecarboxylic acids are prepared via a (1R,4R,5S)-4-acetoxy-6,6-dimethyl-2-oxo-3-oxabicyclo [3.1.0]hexane intermediate.
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: October 11, 1983
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Ketoenamine pyrethroid intermediates
    Patent number: 4374275
    Abstract: Novel pyrethroid intermediates ##STR1## wherein R.sup.1 and R.sup.2 each is alkyl are prepared by treating 2,2-dimethyl-3-(2-oxopropyl)cyclopropylacetaldehyde with a trialkylsilyldialkylamine. The above compounds can be treated with ozone to form 2,3-dimethyl-3-(2-oxopropyl)cyclopropanecarbaldehyde.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: February 15, 1983
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Ketoenamine pyrethroid intermediates
    Patent number: 4324915
    Abstract: Novel pyrethroid intermediates ##STR1## wherein R.sup.1 and R.sup.2 each is alkyl are prepared by treating 2,2-dimethyl-3-(2-oxopropyl)cyclopropylacetaldehyde with a trialkylsilyldialkylamine. The above compounds can be treated with ozone to form 2,2-dimethyl-3-(2-oxopropyl)cyclopropanecarbaldehyde.
    Type: Grant
    Filed: May 1, 1981
    Date of Patent: April 13, 1982
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Oxyimino-substituted (1R,cis)cyclopropanecarboxylate pesticides
    Patent number: 4292325
    Abstract: (1R,cis)-cyclopropane compounds, substantially free of other stereoisomers, and having the formula ##STR1## wherein R.sup.1 is C.sub.3-6 alkyl and R is .alpha.-cyano-3-phenoxybenzyl or 3-phenoxybenzyl, are highly active pesticides.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: September 29, 1981
    Assignee: Shell Oil Company
    Inventors: Steven A. Roman, Samuel B. Soloway
  • Oxyimino-substituted (1R, cis)-cyclopropanecarboxylate pesticides
    Patent number: 4282249
    Abstract: (1R,cis)-cyclopropane compounds, substantially free of other stereoisomers, and having the formula ##STR1## wherein X is chlorine, bromine or OR in whichR is hydrogen, a salt-forming cation, an alkyl group or residues of certain other alcohols; andR.sup.1 is hydrogen, or certain optionally halogenated hydrocarbyl groups,are highly active pesticides or intermediates therefore.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: August 4, 1981
    Assignee: Shell Oil Company
    Inventors: Steven A. Roman, Samuel B. Soloway
  • Oxyimino-substituted cyclopropanecarboxylate
    Patent number: 4281183
    Abstract: New cyclopropane compounds have the formula ##STR1## wherein X is chlorine, bromine or OR in whichR is hydrogen, a salt-forming cation, an alkyl group or residues of certain other alcohols; andW is thienyl, furfuryl, --CO.sub.2 R.sup.1, --CONR.sup.1 R.sup.2, --SO.sub.3 R.sup.1, --SO.sub.2 NR.sup.1 R.sup.2, --PO.sub.3 H, --PO(OR.sup.1).sub.2, --NO.sub.2, --CN, --OR.sup.1, --SR.sup.1, --S(O)R.sup.1, --S(O).sub.2 R.sup.1, --NR.sup.1 R.sup.2, --N(O)R.sup.1 R.sup.2, or --(OCH.sub.2 CH.sub.2).sub.q --OR.sup.1 in which R.sup.1 and R.sup.2 are H or certain optionally-substituted hydrocarbyl groups, q is 1-4, p is 1 or 2 and when p is 1 then W.sup.1 is alkyl or when p is 2 then W.sup.1 is H. The compounds are pesticides or intermediates therefore.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: July 28, 1981
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Cyclopropanecarboxylate pesticides preparation
    Patent number: 4258207
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an acyl group or certain optionally halo-substituted hydrocarbyl groups, and X is --CH.sub.2 CH(OCH.sub.3).sub.2, --CH.sub.2 CHO, --CH.dbd.CHOR.sup.2 in which R.sup.2 is acyl, --CHO, --C(O)Cl, --C(O)Br or --C(O)OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the natural terpene, 3-carene.
    Type: Grant
    Filed: March 15, 1979
    Date of Patent: March 24, 1981
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Oxyimino-substituted (1R, trans)-cyclopropanecarboxylic acids and derivatives thereof
    Patent number: 4254277
    Abstract: (1R, Trans)-cyclopropane compounds, substantially free of other stereoisomers, and having the formula ##STR1## wherein X is chlorine, bromine or OR in whichR is hydrogen, a salt-forming cation, an alkyl group or residues of certain other alcohols; andR.sup.1 is certain optionally halogenated hydrocarbyl groups, are highly active pesticides or intermediates therefore.
    Type: Grant
    Filed: December 20, 1979
    Date of Patent: March 3, 1981
    Assignee: Shell Oil Company
    Inventors: Steven A. Roman, Samuel B. Soloway
  • Cyclopropanecarboxylate pesticides
    Patent number: 4241081
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an acyl group or certain optionally halo-substituted hydrocarbyl groups, and X is --CH.sub.2 CH(OCH.sub.3).sub.2, --CH.sub.2 CHO, --CH.dbd.CHOR.sup.2 in which R.sup.2 is acyl,--CHO,--C(O)Cl, --C(O)Br or --C(O)OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the natural terpene, 3-carene.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: December 23, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Hydrazono-substituted cyclopropanecarboxylate pesticides
    Patent number: 4237163
    Abstract: Cyclopropane compounds having the formula ##STR1## wherein X is chlorine, bromine or OR in whichR is hydrogen, a salt-forming cation, an alkyl group or residues of certain other alcohols andR.sup.1 and R.sup.2 each independently is hydrogen, or certain hydrocarbyl groups,are pesticides or intermediates therefore.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: December 2, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Oxyimino-substituted cyclopropanecarboxylate pesticides
    Patent number: 4237123
    Abstract: New cyclopropane compounds have the formula ##STR1## wherein X is chlorine, bromine or OR in whichR is hydrogen, a salt-forming cation, an alkyl group or residues of certain other alcohols; andW is thienyl, furfuryl, --CO.sub.2 R.sup.1, --CONR.sup.1 R.sup.2, --SO.sub.3 R.sup.1, --SO.sub.2 NR.sup.1 R.sup.2, --PO.sub.3 H, --PO(OR.sup.1).sub.2, --NO.sub.2, --CN, --OR.sup.1, --SR.sup.1, --S(O)R.sup.1, --S(O).sub.2 R.sup.1, --NR.sup.1 R.sup.2, --N(O)R.sup.1 R.sup.2, or --(OCH.sub.2 CH.sub.2).sub.q --OR.sup.1 in which R.sup.1 and R.sup.2 are H or certain optionally-substituted hydrocarbyl groups, q is 1--4, p is 1 or 2 and when p is 1 then W.sup.1 is alkyl or when p is 2 then W.sup.1 is H. The compounds are pesticides or intermediates therefore.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: December 2, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Insecticidal sulfonium salts
    Patent number: 4230863
    Abstract: Novel insecticidal sulfonium salts of 2-(alkylthio)ethyl esters of .alpha.-nitro-.alpha.-1-azacycloalk-2-ylidene) acetic acid.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: October 28, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • 3-(Hydrocarbylthiomethyl)-2,2-dimethyl-cyclopropanecarboxylate pesticides and their preparation
    Patent number: 4223155
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an optionally halo-substituted hydrocarbyl group, and X is --C(O)Cl, --C(O)Br or C(O)OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the neutral terpene, 3-carene.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: September 16, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • 6,6-Dimethyl-3-thiabicyclo[3.1.0]hexan-2-one
    Patent number: 4219658
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an optionally halo-substituted hydrocarbyl group, and X is --C(O)Cl, --C(O)Br or C(O)OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the natural terpene, 3-carene.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: August 26, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • 3-(Hydrocarbylthiomethyl)-2,2-dimethylcyclopropanecarboxylate pesticides
    Patent number: 4219562
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an optionally halo-substituted hydroxcarbyl group, and X is --C(O)Cl, --C(O)Br or C(O)OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the natural terpene, 3-carene.
    Type: Grant
    Filed: March 8, 1979
    Date of Patent: August 26, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Oxyimino-substituted cyclopropanecarboxylate pesticides
    Patent number: 4219565
    Abstract: A cyclopropane compound having the formula ##STR1## wherein R is a residue of certain alcohols; andR.sup.1 is hydrogen, or certain optionally halogenated hydrocarbyl groups,are highly active pesticides.
    Type: Grant
    Filed: June 26, 1979
    Date of Patent: August 26, 1980
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman