Patents Represented by Attorney Lynn T. Fletcher
  • Patent number: 4477676
    Abstract: Mono-, bis- and tris-indolyl-substituted furanones useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared respectively by: the interaction of an indole with mucochloric acid; the interaction of an indole with a 4-mono(indolyl)-substituted 4-oxo-2-butenoic acid; and by the interaction of an indole with a 2,4-bis(indolyl)-substituted 4-oxobutanoic acid or with a 3,5-bis(indolyl)-substituted furanone.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: October 16, 1984
    Assignee: The Hilton-Davis Chemical Co.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4417059
    Abstract: This invention relates to 3,7-bis(disubstituted aminophenyl- or indolyl)-3,7-bis(diphenylamino)pyromellitides, 3,5-bis(disubstituted aminophenyl- or indolyl)-3,5-bis(diphenylamino)pyromellitides and mixtures thereof useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared by the interaction of 2,5-bis(disubstituted aminophenyl- or indolyl)carbonyl-1,4-benzenedicarboxylic acids or 2,4-bis(disubstituted aminophenyl- or indolyl)carbonyl-1,5-benzenedicarboxylic acids and mixtures thereof with diphenylamines.
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: November 22, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4414399
    Abstract: Dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, 2-amino and substituted amino-5'-6'-carboxyfluorans, 1,3-dialkyl-5'/6'-carboxyfluorans, esterified dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, 2-amino and substituted amino-5'/6'-carboxyfluorans, 1,3-dialkyl-5'/6'-carboxyfluorans and 3,3-(corresponding-substituted-diaryl)-5/6-carboxyphthalides useful as color formers, particularly in carbonless duplicating and thermal marking systems, are prepared by the interaction of 4/5-carboxy-2-(4-dialkylamino-substituted-2-hydroxybenzoyl)benzoic acids and substituted diphenylamines to produce the phthalides which are then subjected to ring closure to produce the carboxyfluorans and by the interaction of 4/5-carboxy-2-(4-dialkylamino-substituted-2-hydroxybenzoyl)benzoid acids and substituted 4-hydroxyacetanilides or alkyl phenols which are esterified with alkyl halides or dialkyl sulfates.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: November 8, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4412950
    Abstract: This invention relates to novel (N-substituted sulfonamido) monoazo and disazo compounds, to acid-addition salts of said azo compounds which are useful as direct dyes particularly in the dyeing of cellulose, to novel (N-substituted sulfonamido) substituted nitrobenzene, aniline and acetanilide intermediates to said azo compounds and to methods of preparation of said azo compounds and said intermediates to said azo compounds.
    Type: Grant
    Filed: March 24, 1982
    Date of Patent: November 1, 1983
    Assignee: Sterling Drug Inc.
    Inventor: Nathan N. Crounse
  • Patent number: 4403791
    Abstract: The invention provides processes for the preparation of both known and novel [bis(substituted-aryl)(indolyl)]methanes and [(substituted-aryl)(heteryl)(indolyl)]methanes, useful as color formers, particularly in carbonless duplicating and thermal marking systems, which comprises the interaction of [bis(substituted-aryl)(phenylsulfonyl)]methanes and [(substituted-aryl)(heteryl)(phenylsulfonyl)]methanes with indoles in the presence of either an alkaline or an acidic catalyst.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: September 13, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4398916
    Abstract: A multi-step process for the purification of Quinoline Yellow WS involves generating water-insoluble organic amine salts of sulfonated 2-(2-quinolinyl)-1,3-indandione from technical Quinoline Yellow WS followed by treatment of the amine salt with sodium hydroxide to regenerate Quinoline Yellow WS certifiable as a D&C color.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: August 16, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Nicholas A. Ambrosiano, James E. Kassner
  • Patent number: 4399291
    Abstract: Process comprises the combination of the two steps of condensing Y-benzaldehyde with N--R.sup.2 --N--R.sup.3 -aniline and 3--N--R--N--R.sup.1 -benzoic acid, under acidic conditions to produce 2-[(Y-phenyl) (4--N--R.sup.2 --N--R.sup.3 -aminophenyl)methyl]-5--N--R--N--R.sup.1 -aminobenzoic acid, and oxidizing said benzoic acid to produce 3-(Y-phenyl)-3-(4--N--R.sup.2 --N--R.sup.3 -aminophenyl)-6--N--R--N--R.sup.1 -aminophthalide.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: August 16, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, Patrick J. Jefferies
  • Patent number: 4379710
    Abstract: Storage-stable aqueous compositions containing dissolved water-soluble novel acid addition salts of poly(N-substituted sulfonamido) phthalocyanines which are prepared by the interaction of a single acid or a mixture of acids and poly(N-substituted sulfonamido) phthalocyanines, are useful for direct dyeing, particularly the dyeing of cellulose.
    Type: Grant
    Filed: February 19, 1981
    Date of Patent: April 12, 1983
    Assignee: Sterling Drug Inc.
    Inventor: Nathan N. Crounse
  • Patent number: 4379088
    Abstract: This invention relates to novel mixtures consisting essentially of monoazo compounds and disazo compounds which are substituted with x (N-substituted sulfonamido) groups, to acid-addition salts of said azo compounds, useful as direct dyes particularly in the dyeing of cellulose, and to methods of preparation of said mixtures of (N-substituted sulfonamido) substituted monoazo and disazo compounds.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: April 5, 1983
    Assignee: Sterling Drug Inc.
    Inventor: Nathan N. Crounse
  • Patent number: 4379089
    Abstract: This invention relates to novel mixtures consisting essentially of monoazo compounds and disazo compounds which are substituted with x (N-substituted sulfonamido) groups, to acid-addition salts of said azo compounds, useful as direct dyes particularly in the dyeing of cellulose, and to methods of preparation of said mixtures of (N-substituted sulfonamido) substituted monoazo and disazo compounds.
    Type: Grant
    Filed: October 8, 1980
    Date of Patent: April 5, 1983
    Assignee: Sterling Drug Inc.
    Inventor: Nathan N. Crounse
  • Patent number: 4377698
    Abstract: Mono-. bis- and tris-indolyl-substituted furanones useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared respectively by: the interaction of an indole with mucochloric acid; the interaction of an indole with a 4-mono(indolyl)-substituted 4-oxo-2-butenoic acid; and by the interaction of an indole with a 2,4-bis(indolyl)-substituted 4-oxobutanoic acid or with a 3,5-bis(inodlyl)-substituted furanone.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: March 22, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4376729
    Abstract: This invention relates to novel (N-substituted sulfonamido) monoazo and disazo compounds, to acid-addition salts of said azo compounds which are useful as direct dyes particularly in the dyeing of cellulose, to novel (N-substituted sulfonamido) substituted nitrobenzene, aniline and acetanilide intermediates to said azo compounds and to methods of preparation of said azo compounds and said intermediates to said azo compounds.
    Type: Grant
    Filed: October 8, 1980
    Date of Patent: March 15, 1983
    Assignee: Sterling Drug Inc.
    Inventor: Nathan N. Crounse
  • Patent number: 4370443
    Abstract: Water-soluble triazine-nucleated polymeric quaternary ammonium compounds, which are prepared by the interaction of 2,4,6-trichloro-1,3,5-triazine with one molecular proportion of an aliphatic or cycloaliphatic diamine containing at least one tertiary nitrogen atom capable of being quaternized to effect polymerisation and then with a second molecular equivalent of the same diamine or a different amine, are useful as mordants for water-soluble dyestuffs on cellulosic fibers; as fixing agents for pigments on cellulosic fibers; as softening agents for fibers; and as surface active agents for effecting aqueous dispersions of pigments and of colorless dyestuff precursors for carbonless duplicating systems.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: January 25, 1983
    Assignee: Sterling Drug Inc.
    Inventor: Eugene P. Wesseler
  • Patent number: 4363664
    Abstract: Stable, concentrated, free-flowing aqueous dispersion compositions containing one or more colorless dyestuff precursors and one or more surface active agents, are useful in the manufacture of paper for pressure sensitive carbonless duplicating manifold systems and thermal marking systems.
    Type: Grant
    Filed: January 25, 1980
    Date of Patent: December 14, 1982
    Assignee: Sterling Drug Inc.
    Inventor: John W. Delaney
  • Patent number: 4351768
    Abstract: 3-Aryl-3-indolylphthalides, 3-aryl-3-pyrrolylphthalides and 3-aryl-3-carbazolylphthalides prepared by interaction of the appropriate 2-(heteroaryl)carbonylbenzoic acid and the appropriate phenylamine, and 3,3-bis(indolyl)phthalides prepared by the interaction of the appropriate 2-(indolyl)carbonylbenzoic acid and the appropriate indole are useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems.
    Type: Grant
    Filed: March 14, 1980
    Date of Patent: September 28, 1982
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4347352
    Abstract: Water-soluble triazine-nucleated polymeric quaternary ammonium compounds, which are prepared by the interaction of 2,4,6-trichloro-1,3,5-triazine with one molecular proportion of an aliphatic or cycloaliphatic diamine containing at least one tertiary nitrogen atom capable of being quaternized to effect polymerization and then with a second molecular equivalent of the same diamine or a different amine, are useful as mordants for water-soluble dyestuffs on cellulosic fibers; as fixing agents for pigments on cellulosic fibers; as softening agents for fibers; and as surface active agents for effecting aqueous dispersions of pigments and of colorless dyestuff precursors for carbonless duplicating systems.
    Type: Grant
    Filed: April 15, 1981
    Date of Patent: August 31, 1982
    Assignee: Sterling Drug Inc.
    Inventor: Eugene P. Wesseler
  • Patent number: 4343493
    Abstract: This invention relates to 3,7-bis(disubstituted aminophenyl- or indolyl)-3,7-bis(diphenylamino)pyromellitides, 3,5-bis(disubstituted aminophenyl- or indolyl)-3,5-bis(diphenylamino)pyromellitides and mixtures thereof useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared by the interaction of 2,5-bis(disubstituted aminophenyl- or indolyl)carbonyl-1,4-benzenedicarboxylic acids or 2,4-bis(disubstituted aminophenyl- or indolyl)carbonyl-1,5-benzenedicarboxylic acids and mixtures thereof with diphenylamines.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: August 10, 1982
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4322352
    Abstract: 3-Aryl-3-indolylphthalides, 3-aryl-3-pyrrolylphthalides and 3-aryl-3-carbazolylphthalides prepared by interaction of the appropriate 2-(heteroaryl)carbonylbenzoic acid and the appropriate phenylamine, and 3,3-bis(indolyl)phthalides prepared by the interaction of the appropriate 2-(indolyl)carbonylbenzoic acid and the appropriate indole are useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems.
    Type: Grant
    Filed: March 14, 1980
    Date of Patent: March 30, 1982
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4320140
    Abstract: Synergistic insecticidal compositions are mixtures of at least one insecticidally active water-soluble xanthene dye chosen from amongst erythrosine and Rose Bengal in admixture with the essentially non-insecticidally active and synergistically-effective fluorescein sodium.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: March 16, 1982
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, James R. Heitz
  • Patent number: 4314001
    Abstract: Water-soluble triazine-nucleated polymeric quaternary ammonium compounds, which are prepared by the interaction of 2,4,6-trichloro-1,3,5-triazine with one molecular proportion of an aliphatic or cycloaliphatic diamine containing at least one tertiary nitrogen atom capable of being quaternized to effect polymerization and then with a second molecular equivalent of the same diamine or a different amine, are useful as mordants for water-soluble dyestuffs on cellulosic fibers; as fixing agents for pigments on cellulosic fibers; as softening agents for fibers; and as surface active agents for effecting aqueous dispersions of pigments and of colorless dyestuff precursors for carbonless duplicating systems.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: February 2, 1982
    Assignee: Sterling Drug Inc.
    Inventor: Eugene P. Wesseler