Patents Represented by Attorney Gerald E. Deitch
  • Patent number: 6984736
    Abstract: This invention relates to a process for producing N-aryl-2-lactams, N-alkyl-2-lactams, and N-cycloalkyl-2-lactams by reductive amination of lactones with aryl or alkyl nitro compounds utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: January 10, 2006
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6982339
    Abstract: This invention relates to a process for producing N-aryl-2-lactams and N-cycloalkyl-2-lactams by reductive amination of lactones with aryl amines utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: January 3, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6930126
    Abstract: This invention relates to a process for producing 5-methyl-N-(methyl aryl)-2-pyrrolidone, 5-methyl-N-(methyl cycloalkyl)-2-pyrrolidone and 5-methyl-N-alkyl-2-pyrrolidone by reductive amination of levulinic acid esters with aryl or alkyl cyano compounds utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: August 16, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6916842
    Abstract: This invention relates to a process for producing 5-methyl-N-(methyl aryl)-2-pyrrolidone, 5-methyl-N-(methyl cycloalkyl)-2-pyrrolidone and 5-methyl-N-alkyl-2-pyrrolidone by reductive amination of levulinic acid esters with aryl or alkyl cyano compounds utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: July 12, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6835849
    Abstract: The invention relates to the synthesis of alkenoate esters from a corresponding lactone and an alcohol in the presence of a basic catalyst. More specifically, this invention relates to the synthesis of methyl-4-pentenoate ester from 5-methyl butyrolactone and methanol.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: December 28, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6828277
    Abstract: This invention relates to a process for producing N-aryl-2-lactams, N-alkyl-2-lactams, and N-cycloalky-2-lactams by reductive amination of lactones with aryl or alkyl nitro compounds utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: December 7, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6828278
    Abstract: This invention relates to a process for producing N-aryl-2-lactams and N-cycloalkyl-2-lactams by reductive amination of lactones with aryl amines utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: December 7, 2004
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6818593
    Abstract: This invention relates to a process for producing 5-methyl-N-aryl-2-pyrrolidone, 5-methyl-N-cycloalkyl-2-pyrrolidone, and 5-methyl-N-alkyl-2-pyrrolidone by reductive amination of levulinic acid with nitro compounds utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: November 16, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Patent number: 6774158
    Abstract: The present invention is directed to a polyhydroxyalkanoate copolymer composition that can be readily and quickly processed into extruded and molded articles and film-based products. More specifically, the invention pertains to melt processing of polyhydroxyalkanoates which contain a novel combination of nucleant and plasticizer for enhancing crystallization rates thus causing improved processibility.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: August 10, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Garret D. Figuly
  • Patent number: 6764984
    Abstract: Fluorinated dialkyl dithiophosphoric acids according to formula (I) and metallic salts thereof: the compounds are useful, for example, as additives for lubricant compositions.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: July 20, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Richard P. Beatty
  • Patent number: 6737539
    Abstract: Disclosed herein are processes for hydrocyanation and isomerization of olefins by using at least one multidentate phosphonite ligands, including organometallic phosphonite ligands with a Group VIII metal or Group VIII metal compound, and optionally, a Lewis acid promoter.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: May 18, 2004
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Christian P. Lenges, Helen S. M. Lu, Joachim C. Ritter
  • Patent number: 6716977
    Abstract: Method for making caprolactam from 6-aminocapronitrile that contains greater than 500 ppm tetrahydroazepine and its derivatives (THA) in which ammonia and water are removed from crude caprolactam in a single separation step and then THA is removed from the resulting caprolactam melt.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: April 6, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Gregory S. Kirby, John J. Ostermaier
  • Patent number: 6677484
    Abstract: Powder comprising substantially spherical particles of at least one compound selected from the group consisting of azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, brassylic acid, and the anhydrides of said acids, said at least one compound being distributed substantially uniformly throughout the entirety of each of said particles, said particles having a particle size distribution as follows: d90 - d10 d50 < 1.90 wherein: d50 is a particle diameter at which 50% of the particles have diameters which are greater or smaller than the d50 value; d90 is a particle diameter at which 90% of the particles have diameters which are smaller than the d90 value; d10 is the particle diameter at which 10% of the particles have diameters which are smaller than the d10 value; and d50 is 8 to 30 micrometers.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: January 13, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ronald Lee Amey, George Alan Schurr
  • Patent number: 6660876
    Abstract: A polymeric, phosphorus-containing composition made by heating, in the presence of an initiator, preferably a free radical initiator, and optionally in the presence of one or more comonomers, at least one substituted phosphonylated 2,2′-dihydroxyl-1,1′-binaphthalene or at least one substituted 2,2′-dihydroxyl-1,1′-biphenylene.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: December 9, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Michel R. Gagne, Kenneth G. Moloy, Nora S. Radu, Brian P. Santora, Wilson Tam
  • Patent number: 6599398
    Abstract: Process for the recovery of a purified adiponitrile (ADN) from a mixture of adiponitrile, aminocapronitrile and hexamethylenediamine, utilizing two sequential distillations: (1) a first distillation in which the mixture is distilled in a distillation column at a head pressure that causes at least 7% of the ADN to go into the distillate, along with bishexamethylenetriamine (BHMT) and 2-cyanocyclopentylideneimine (CPI), and (2) a second distillation in which the distillate from the first distillation is distilled in a second distillation column at a head pressure sufficient to cause minimum-temperature azeotropy between ADN and BHMT, thereby allowing the majority of the BHMT and CPI to be removed from the second distillation as distillate, and ADN, substantially free of both BHMT and CPI, to be removed as bottoms.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: July 29, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John Ostermaier, Leon Scott, James Hastings
  • Patent number: 6555718
    Abstract: A process for making a compound of the formula I
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: April 29, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Rafael Shapiro
  • Patent number: 6489517
    Abstract: A process for making a compound of the formula I
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: December 3, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Rafael Shapiro
  • Patent number: 6479620
    Abstract: A process for making nylon 6, in which caprolactam and water are reacted in a multistage reactive distillation column.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: November 12, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Stuart B. Fergusson, Ernest Keith Marchildon, Ahmet Turgut Mutel
  • Patent number: 6476181
    Abstract: Process for increasing the molecular weight of nylon 6 while reducing its content of caprolactam and other volatiles by a two-staged heating process.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: November 5, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Albert W. Alsop, David N. Marks
  • Patent number: 6472501
    Abstract: Process for making Nylon 6,6 by reacting adiponitrile, hexamethylenediamine and steam in a multistage distillation column reactor.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: October 29, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Stuart B. Fergusson, Ernest Keith Marchildon, Ahmet Turgut Mutel