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).

  • Patent number: 4337340
    Abstract: Substituted furopyridinones and furopyrazinones which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting diphenylamines with substituted benzoyl (or 3-indolylcarbonyl)pyridinecarboxylic acids and substituted benzoyl (or 3-indolylcarbonyl)pyrazinecarboxylic acids, respectively.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: June 29, 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: 4321369
    Abstract: Aldehyde or ketone 0-[(3-indolyl)(aryl or heteroaryl)methyl]oximes 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 aldehyde or ketone oximes in the presence of a base.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: March 23, 1982
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4307898
    Abstract: 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: Grant
    Filed: March 6, 1980
    Date of Patent: December 29, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4307018
    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: December 22, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4298215
    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-subsituted-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: Grant
    Filed: March 31, 1980
    Date of Patent: November 3, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4283077
    Abstract: Aldehyde or ketone 0-[(3-indolyl)(aryl or heteroaryl)methyl]oximes 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 aldehyde or ketone oximes in the presence of a base.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: August 11, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4274660
    Abstract: Dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, esterified dialkylamino-substituted 2-anilino-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 which are esterified with alkyl halides or dialkyl sulfates.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: June 23, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William Mo-Wei Hung
  • Patent number: 4275121
    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 19, 1979
    Date of Patent: June 23, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4257954
    Abstract: 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: Grant
    Filed: June 14, 1979
    Date of Patent: March 24, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4255577
    Abstract: 3-[4-(Disubstituted-amino)phenyl] or (9-julolidinyl)-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive and thermal marking systems are prepared by reaction of 2-[4-(disubstituted-amino)benzoyl] or (9-julolidinyl-carbonyl)benzoic acids with diphenylamines.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: March 10, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4251446
    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: April 4, 1979
    Date of Patent: February 17, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4251092
    Abstract: 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: Grant
    Filed: November 27, 1978
    Date of Patent: February 17, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4243250
    Abstract: Substituted furopyridinones and furopyrazinones which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting diphenylamines with substituted benzoyl (or 3-indolylcarbonyl)pyridinecarboxylic acids and substituted benzoyl (or 3-indolylcarbonyl)pyrazinecarboxylic acids, respectively.
    Type: Grant
    Filed: June 14, 1979
    Date of Patent: January 6, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4220357
    Abstract: Substituted 3,3-diphenylphthalides, useful as color precursors, particularly in the art of pressure-sensitive duplicating systems and heat-sensitive marking systems, are prepared by condensing substituted 2-benzoylbenzoic acids with substituted anilines.
    Type: Grant
    Filed: March 28, 1979
    Date of Patent: September 2, 1980
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4216263
    Abstract: A new and improved magnet wire is provided comprising a copper or aluminum conductor, a basecoat consisting of at least one layer of insulating material around and along the length of the conductor and a polyundecaneamide or polydodecaneamide topcoat around and along the length of the basecoat, wherein the topcoat comprises from approximately 5 to 95% of the total coating thickness.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: August 5, 1980
    Assignee: Rea Magnet Wire Co., Inc.
    Inventors: Harold R. Otis, Charles E. Blake, Paul J. Schmidt
  • Patent number: 4211872
    Abstract: Substituted furopyridinones and furopyrazinones which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting diphenylamines with substituted benzoyl (or 3-indolylcarbonyl)pyridinecarboxylic acids and substituted benzoyl (or 3-indolylcarbonyl)pyrazinecarboxylic acids, respectively.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: July 8, 1980
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4209618
    Abstract: Substituted 3,3-diphenylphthalides, useful as color precursors, particularly in the art of pressure-sensitive duplicating systems and heat-sensitive marking systems, are prepared by condensing substituted 2-benzoylbenzoic acids with substituted anilines.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: June 24, 1980
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt
  • Patent number: 4200313
    Abstract: 3-[4-(Disubstituted-amino)phenyl] or (9-julolidinyl)-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive and thermal marking systems are prepared by reaction of 2-[4-(disubstituted-amino)benzoyl] or (9-julolidinyl-carbonyl)benzoic acids with diphenylamines.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: April 29, 1980
    Assignee: Sterling Drug Inc.
    Inventors: Paul J. Schmidt, William M. Hung
  • Patent number: 4189171
    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: January 11, 1978
    Date of Patent: February 19, 1980
    Assignee: Sterling Drug Inc.
    Inventors: Nathan N. Crounse, Paul J. Schmidt