Patents Represented by Attorney Gerald E. Deitch

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  • Methylenelactones syntheses in supercritical fluids
    Patent number: 7314942
    Abstract: Alpha-methylenelactone is produced from butyrolactone and valerolactone by the addition of formaldehyde in a supercritical fluid.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: January 1, 2008
    Assignee: E. I. duPont de Nemours & Co.
    Inventors: Keith W. Hutchenson, Leo E. Manzer
  • Preparation of polytrimethylene ether glycol and copolymers thereof
    Patent number: 7238772
    Abstract: The present invention relates to a process comprising using ionic liquids for the polycondensation of 1,3-propanediol reactants to produce polytrimethylene ether glycol and copolymers thereof.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: July 3, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mark Andrew Harmer, Christopher P. Junk
  • Liquid phase synthesis of methylene lactones using novel grafted catalyst
    Patent number: 7205416
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that exhibits high conversion and selectivity.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: April 17, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Supercritical fluid phase synthesis of methylene lactones using novel grafted catalyst
    Patent number: 7166727
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms in a supercritical or near-critical fluid phase reaction using a novel grafted catalyst that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 23, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Supercritical fluid phase synthesis of methylene lactones using novel catalyst field of invention
    Patent number: 7164032
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also provides high reactor productivity (mass of product per mass of catalyst per unit of time) and sustained maintenance of a high level of activity and productivity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 16, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Gas phase synthesis of methylene lactones using novel catalyst
    Patent number: 7164033
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 16, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernst Manzer
  • Gas phase synthesis of methylene lactones using novel grafted catalyst
    Patent number: 7161014
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 9, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Ionic liquids
    Patent number: 7157588
    Abstract: The present invention relates to compositions of matter that are useful as ionic liquids. The compositions of the invention are based on an N-substituted pyrrolidinone, said pyrrolidinone having a pendant ammonium cation that is separated from the pyrrolidone ring by a variable length alkyl spacer.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: January 2, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mark Andrew Harmer, Christopher P. Junk, Leo Ernest Manzer
  • Gas phase synthesis of methylene lactones using oxynitride catalyst
    Patent number: 7151185
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms using an oxynitride catalyst or a composite oxynitride catalyst incorporating lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, or barium or combinations thereof.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: December 19, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernest Manzer
  • Production of 5-methyl-N-aryl-2-pyrrolidone and 5-methyl-N-alkyl-2-pyrrolidone by reductive of levulinic acid esters with aryl and alkyl amines
    Patent number: 7129362
    Abstract: This invention relates to a process for producing 5-methyl-N-aryl-2-pyrrolidone, 5-methyl-N-alkyl-2-pyrrolidone, and 5-methyl-N-cycloalkyl-2-pyrrolidone by reductive amination of levulinic acid esters with aryl or alkyl amines utilizing a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: October 31, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Production of 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 cyano compounds
    Patent number: 7030074
    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: April 18, 2006
    Assignee: E I. duPont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Process for converting ?-angelica lactone to 5-methyl-N-alkyl-2-pyrrolidone using alkyl amines
    Patent number: 7030249
    Abstract: This invention relates to a process for producing 5-methyl-N-alkyl-2-pyrrolidone by a) reacting ?-angelica lactone with alkyl amines and b) hydrogenating the products of step (a) in the presence of a metal catalyst, which is optionally supported.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: April 18, 2006
    Assignee: E. I. uPont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Production of 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 cyano compounds
    Patent number: 7025819
    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: April 11, 2006
    Assignee: E. I. duPont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Production of 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 cyano compounds
    Patent number: 7014697
    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: March 21, 2006
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Process of making polypeptide fibers
    Patent number: 7014807
    Abstract: Process of making polypeptide fibers including the steps of contacting a polypeptide with a solution of formic acid a divalent metal ion salt, or contacting a decrystallized polypeptide with formic acid having a water content less than 3 wt % and concentrating the resulting solution to a polypeptide concentration greater than 10 wt %.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: March 21, 2006
    Assignee: E.I. duPont de Nemours and Company
    Inventor: John P. O'Brien
  • Production of a N-aryl-2-lactam and N-cycloalkyl-2-lactam by reductive amination of lactones with aryl amines
    Patent number: 7002024
    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: February 21, 2006
    Assignee: E. I. duPont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Production of N-aryl-2-lactam and N-alkyl-2-lactam by reductive amination of lactones with aryl and alkyl nitro compounds
    Patent number: 6995275
    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: February 7, 2006
    Assignee: E.I. duPont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Production of N-aryl-2-lactam and N-cycloalkyl-2-lactam by reductive amination of lactones with arylamines
    Patent number: 6992195
    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 31, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Leo Ernest Manzer
  • Blends of poly[?-methylenelact(one)(am)] homo-and copolymers
    Patent number: 6992141
    Abstract: Polymers containing ?-methylenelact(ones)(ams) such as ?-methylenebutyrolactones are useful in blends with other polymers. For examples such polymers which have reactive groups are toughened by mixing with a rubbery material which has complimentary reactive groups, or polymers containing repeat units derived from ?-methylenelact(ones)(ams) are toughened by mixing with polymeric core-shell particles having an elastomeric core and a specified thermoplastic shell. The properties of thermoplastics are also improved by blending with ?-methylenelact(ones)(ams) such as ?-methylenebutyrolactones containing (co)polymers.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: January 31, 2006
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Charles J. Brandenburg, David M. Dean, George Henry Hofmann, Rutger D. Puts, Randal King, Edmund Arthur Flexman
  • Production of N-aryl-2-lactam and N-alkyl-2-lactam by reductive amination of lactones with aryl and alkyl nitro compounds
    Patent number: 6987192
    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 17, 2006
    Assignee: E.I. duPont de Nemours and Company
    Inventor: Leo Ernest Manzer