Patents by Inventor Paul J. Schmidt
Paul J. Schmidt 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).
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Patent number: 4528136Abstract: 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: GrantFiled: April 14, 1983Date of Patent: July 9, 1985Assignee: The Hilton-Davis Chemical Co.Inventors: Paul J. Schmidt, Patrick J. Jefferies
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Patent number: 4515971Abstract: 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)benzoic acids and substituted 4-hydroxyacetanilides or alkyl phenols which are esterified with alkyl halides or dialkyl sulfates.Type: GrantFiled: July 6, 1981Date of Patent: May 7, 1985Assignee: Hilton-Davis Chemical Co.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4507483Abstract: 3-[(Substituted-amino)(aryl or heteroaryl)methyl]-1H-indoles which are useful as color-formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting 3-[(arylsulfonyl)(aryl or heteroaryl)methyl]-1H-indoles with amines or precursors thereof in the presence of a base.Type: GrantFiled: March 9, 1983Date of Patent: March 26, 1985Assignee: The Hilton-Davis Chemical Co.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4494989Abstract: Mono and bis substituted (arylsulfonyl)alkanes useful as color formers, particularly in carbonless duplicating and thermal marking systems, are prepared by the interaction of the appropriate aldehyde or dialdehyde with the appropriate aryl or heterocyclic moiety and the appropriate phenylsulfinic acid in the presence of a catalyst.Type: GrantFiled: July 19, 1982Date of Patent: January 22, 1985Assignee: The Hilton-Davis Chemical Co.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4485242Abstract: 3-[(Alkoxy)(aryl or heteroaryl)methyl]-1H-indoles which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting 3-[(arylsulfonyl)(aryl or heteroaryl)methyl]-1H-indoles with alcohols in the presence of a base.Type: GrantFiled: July 30, 1981Date of Patent: November 27, 1984Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4477676Abstract: 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: GrantFiled: July 6, 1982Date of Patent: October 16, 1984Assignee: The Hilton-Davis Chemical Co.Inventors: Nathan N. Crounse, Paul J. Schmidt
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Patent number: 4451657Abstract: 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: GrantFiled: November 16, 1979Date of Patent: May 29, 1984Assignee: The Hilton-Davis Chemical Co.Inventors: Nathan N. Crounse, Paul J. Schmidt
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Patent number: 4446321Abstract: Novel 4-aryl-or heteroaryl-2,6-bis[(substituted-amino)phenyl]pyridines which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting a 2-, 3- or 4-R.sub.1 R.sub.2 N-acetophenone with an aryl or heteroaryl aldehyde in the present of ammonia or an ammonia-releasing agent.Type: GrantFiled: June 3, 1982Date of Patent: May 1, 1984Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4431819Abstract: 3-Heteroaryl-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems are prepared by reacting 2-(heteroarylcarbonyl)benzoic acids with diphenylamines.Type: GrantFiled: April 28, 1980Date of Patent: February 14, 1984Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4417059Abstract: 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: GrantFiled: August 19, 1981Date of Patent: November 22, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4414399Abstract: 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: GrantFiled: April 15, 1983Date of Patent: November 8, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4403791Abstract: 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: GrantFiled: August 6, 1981Date of Patent: September 13, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4399291Abstract: 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: GrantFiled: December 9, 1981Date of Patent: August 16, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, Patrick J. Jefferies
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Patent number: 4398030Abstract: 3-[(Substituted-amino)(aryl or heteroaryl)methyl]-1H-indoles which are useful as color-formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting 3-[(arylsulfonyl)(aryl or heteroaryl)methyl]-1H-indoles with amines or precursors thereof in the presence of a base.Type: GrantFiled: January 22, 1982Date of Patent: August 9, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4396767Abstract: Novel 4-[4-(substituted-amino)phenyl]- or heteroaryl-2,6-bis(heteroaryl)pyridines which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting a heteroaryl methyl ketone with a 2-R.sub.4 -4-NR.sub.5 R.sub.6 -benzaldehyde or a heteroaryl aldehyde in the presence of ammonia or an ammonia-releasing agent.Type: GrantFiled: March 16, 1981Date of Patent: August 2, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4377698Abstract: 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: GrantFiled: July 7, 1980Date of Patent: March 22, 1983Assignee: Sterling Drug Inc.Inventors: Nathan N. Crounse, Paul J. Schmidt
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Patent number: 4363503Abstract: Novel 4-aryl-or heteroaryl-2,6-bis[(substituted-amino)phenyl]pyridines which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting a 2-, 3- or 4-R.sub.1 R.sub.2 N-acetophenone with an aryl or heteroaryl aldehyde in the present of ammonia or an ammonia-releasing agent.Type: GrantFiled: March 16, 1981Date of Patent: December 14, 1982Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4351768Abstract: 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: GrantFiled: March 14, 1980Date of Patent: September 28, 1982Assignee: Sterling Drug Inc.Inventors: Nathan N. Crounse, Paul J. Schmidt
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Patent number: 4343493Abstract: 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: GrantFiled: August 29, 1980Date of Patent: August 10, 1982Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4341402Abstract: 3-[(Substituted-amino)(aryl or heteroaryl)methyl]-1H-indoles which are useful as color-formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting 3-[(arylsulfonyl)(aryl or heteroaryl)methyl]-1H-indoles with amines or precursors thereof in the presence of a base.Type: GrantFiled: March 6, 1980Date of Patent: July 27, 1982Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. W. Hung