Patents by Inventor David M. Dean

David M. Dean 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: 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
  • Patent number: 6953619
    Abstract: Disclosed are conductive polymeric materials comprising a resin-based structural material loaded with micron conductive fibers and/or micron conductive powders or to provide a conductive thermoplastic composition rather than an insulator. Also disclosed are antennas comprising the conductive thermoplastic compositions and methods for their fabrication.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: October 11, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David M. Dean, Mehrdad Mehdizadeh, Steven F. Fecanin, Stewart Carl Feinberg
  • Patent number: 6910573
    Abstract: A post-mix container provided with an upper container body and a lower container body. The upper container body has a coverable first opening on a proximal end and the lower container body has a coverable second opening on a proximal end. The proximal ends of the upper and lower container bodies may be moved axially toward each other so that covering of the second opening in the lower container body is removed and then the covering of the first opening in the upper container body is removed, after which the contents of the upper and lower container bodies can be mixed with each other.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: June 28, 2005
    Inventor: David M. Deans
  • Patent number: 6846429
    Abstract: This invention provides a transparent, paramagnetic polymer composition in which a polymer is completed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20×10?6 emu/g measured at 298° K. This invention provides optically responsive devices that employ these transparent, paramagnetic polymers as an element that is responsive to a magnetic field and a means for providing magnetic field. This invention provides transparent labels or markings employing these transparent, paramagnetic polymers.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: January 25, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: David M. Dean
  • Publication number: 20040249025
    Abstract: Disclosed are a thermoplastic polymer-linked-asphalt composition and a process for making a thermoplastic polymer-linked-asphalt. More particularly, the present invention relates to the reaction and resultant linking of a combination of epoxide-containing polymers and anhydride-containing polymers to asphalt to form a polymer-linked-asphalt composition having higher softening points. The improved polymer-linked-asphalt product is particularly useful in roofing applications.
    Type: Application
    Filed: April 14, 2004
    Publication date: December 9, 2004
    Inventor: David M. Dean
  • Publication number: 20040230013
    Abstract: This invention discloses blends of copolymeric compositions with repeat units of glycidyl methacrylate and alpha-methylene-gamma-methyl-gamma-butyrolactone with polyphenylene sulfide (PPS). This invention further discloses a process for improving mechanical properties of PPS.
    Type: Application
    Filed: January 28, 2004
    Publication date: November 18, 2004
    Inventors: Charles J. Brandenburg, David M. Dean
  • Publication number: 20040222924
    Abstract: Disclosed are conductive polymeric materials comprising a resin-based structural material loaded with micron conductive fibers and/or micron conductive powders or to provide a conductive thermoplastic composition rather than an insulator. Also disclosed are antennas comprising the conductive thermoplastic compositions and methods for their fabrication.
    Type: Application
    Filed: January 29, 2004
    Publication date: November 11, 2004
    Inventors: David M. Dean, Mehrdad Mehdizadeh, Steven F. Fecanin, Stewart Carl Feinberg
  • Publication number: 20040211742
    Abstract: A post-mix container provided with an upper container body and a lower container body. The upper container body has a coverable first opening on a proximal end and the lower container body has a coverable second opening on a proximal end. The proximal ends of the upper and lower container bodies may be moved axially toward each other so that covering of the second opening in the lower container body is removed and then the covering of the first opening in the upper container body is removed, after which the contents of the upper and lower container bodies can be mixed with each other.
    Type: Application
    Filed: November 5, 2003
    Publication date: October 28, 2004
    Inventor: David M. Deans
  • Patent number: 6805956
    Abstract: The present invention relates a process for manufacturing polymer coated wire and cable and an electrically conductive wire having a metal core and an outer electrically-insulative, polymer coating capable of withstanding temperatures as high as 150° C., wherein the polymer composition contains polyphenylene sulfide, a polymeric grafting agent and an ethylene copolymer. The polymeric grafting agent is a copolymer of at least about 50% by weight ethylene, about 0.5% to about 15% by weight of a reactive comonomer (e.g. unsaturated epoxide of 4-11 carbon atoms) and the ethylene copolymer comprises at least about 50% by weight ethylene and about 1% to about 35% by weight of an acid-containing unsaturated mono-carboxylic acid comonomer. The molar ratio of the reactive comonomer in the polymeric grafting agent to the unsaturated mono-carboxylic acid comonomer of the ethylene copolymer is to be maintained between 1.0 and 5.5 in order to achieve the desired polyphenylene sulfide wire coating properties.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: October 19, 2004
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David M. Dean, Richard James Arhart
  • Patent number: 6790542
    Abstract: This invention provides a transparent, paramagnetic polymer composition in which a polymer is complexed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20×10−6 emu/g measured at 298° K. This invention provides optically responsive devices that employ these transparent, paramagnetic polymers as an element that is responsive to a magnetic field and a means for providing magnetic field. This invention provides transparent labels or markings employing these transparent, paramagnetic polymers.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: September 14, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David M. Dean, Charles J. Molnar
  • Patent number: 6741770
    Abstract: This invention provides a transparent, paramagnetic polymer composition in which a polymer is complexed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20×10−6 emu/g measured at 298° K. This invention provides optically responsive devices that employ these transparent, paramagnetic polymers as an element that is responsive to a magnetic field and a means for providing magnetic field. This invention provides transparent labels or markings employing these transparent, paramagnetic polymers.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: May 25, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David M. Dean, Charles J. Molnar
  • Patent number: 6723790
    Abstract: Polymers containing &agr;-methylenelact(ones)(ams) such as &agr;-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 &agr;-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 &agr;-methylenelact(ones)(ams) such as &agr;-methylenebutyrolactones containing (co)polymers.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: April 20, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Charles J. Brandenburg, David M. Dean, George Henry Hofmann, Rutger D. Puts, Edmund A. Flexman
  • Patent number: 6645623
    Abstract: The present invention relates an electrically conductive wire having a metal core and an outer electrically-insulative, polymer coating wherein the polymer composition contains polyphenylene sulfide, a polymeric grafting agent and an ethylene copolymer. The polymeric grafting agent is a copolymer of at least about 50% by weight ethylene, about 0.5% to about 15% by weight of a reactive comonomer selected from the group consisting of: (i) an unsaturated epoxide of 4-11 carbon atoms, (ii) an unsaturated isocyanate of 2-11 carbon atoms, (iii) an unsaturated alkoxy silane and/or unsaturated alkyl silane wherein the alkoxy or alkyl group is from 1-12 carbon atoms, and (iv) an oxazoline; and about 0 to about 49% by weight of a third optional comonomer selected from at least one of an alkyl acrylate, alkyl methacrylate, vinyl ether, carbon monoxide, and sulfur dioxide, where the alkyl and ether groups are of 1-12 carbon atoms.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: November 11, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David M. Dean, Richard James Arhart
  • Patent number: 6608136
    Abstract: The present invention relates to polymer compositions containing polyphenylene sulfide, a polymeric grafting agent and an ethylene copolymer. The polymeric grafting agent is a copolymer of at least about 50% by weight ethylene, about 0.5% to about 15% by weight of a first reactive moiety selected from the group consisting of: (i) an unsaturated epoxide of 4-11 carbon atoms, (ii) an unsaturated isocyanate of 2-11 carbon atoms, (iii) an alkoxy or alkyl silane wherein the alkyl group is from 1-12 carbon atoms, and (iv) an oxazoline; and about 0 to about 49% by weight of a second moiety selected from at least one of an alkyl acrylate, alkyl methacrylate, vinyl ether, carbon monoxide, and sulfur dioxide, where the alkyl and ether groups are of 1-12 carbon atoms.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: August 19, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David M. Dean, Richard James Arhart
  • Patent number: 6593428
    Abstract: The invention provides thermoplastic polymer alloy compositions based on syndiotactic polystyrene, ethylene copolymers and styrene block copolymers. They are useful in high temperature, chemical resistant molding applications. The compositions are formed by melt-blending under high shear. Preferably the composition contains syndiotactic polystyrene, an epoxy group-containing ethylene copolymer, an acid group-containing styrene copolymer, and optionally a styrene-containing block copolymer.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: July 15, 2003
    Assignee: E. I. duPont de Nemours and Company
    Inventor: David M. Dean
  • Publication number: 20030111254
    Abstract: The present invention relates a process for manufacturing polymer coated wire and cable and an electrically conductive wire having a metal core and an outer electrically-insulative, polymer coating capable of withstanding temperatures as high as 150° C., wherein the polymer composition contains polyphenylene sulfide, a polymeric grafting agent and an ethylene copolymer. The polymeric grafting agent is a copolymer of at least about 50% by weight ethylene, about 0.5% to about 15% by weight of a reactive comonomer (e.g. unsaturated epoxide of 4-11 carbon atoms) and the ethylene copolymer comprises at least about 50% by weight ethylene and about 1% to about 35% by weight of an acid-containing unsaturated mono-carboxylic acid comonomer. The molar ratio of the reactive comonomer in the polymeric grafting agent to the unsaturated mono-carboxylic acid comonomer of the ethylene copolymer is to be maintained between 1.0 and 5.5 in order to achieve the desired polyphenylene sulfide wire coating properties.
    Type: Application
    Filed: July 23, 2002
    Publication date: June 19, 2003
    Inventors: David M. Dean, Richard James Arhart
  • Publication number: 20030068439
    Abstract: This invention provides a transparent, paramagnetic polymer composition in which a polymer is complexed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20×10−6 emu/g measured at 298° K.
    Type: Application
    Filed: January 16, 2002
    Publication date: April 10, 2003
    Inventors: David M. Dean, Charles J. Molnar
  • Publication number: 20030069376
    Abstract: This invention provides a transparent, paramagnetic polymer composition in which a polymer is completed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20×10−6 emu/g measured at 298° K.
    Type: Application
    Filed: January 16, 2002
    Publication date: April 10, 2003
    Inventor: David M. Dean
  • Publication number: 20030021524
    Abstract: This invention provides a transparent, paramagnetic polymer composition in which a polymer is complexed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20×10−6 emu/g measured at 298° K.
    Type: Application
    Filed: January 16, 2002
    Publication date: January 30, 2003
    Inventors: David M. Dean, Charles J. Molnar
  • Publication number: 20020079125
    Abstract: The present invention relates an electrically conductive wire having a metal core and an outer electrically-insulative, polymer coating wherein the polymer composition contains polyphenylene sulfide, a polymeric grafting agent and an ethylene copolymer. The polymeric grafting agent is a copolymer of at least about 50% by weight ethylene, about 0.5% to about 15% by weight of a reactive comonomer selected from the group consisting of: (i) an unsaturated epoxide of 4-11 carbon atoms, (ii) an unsaturated isocyanate of 2-11 carbon atoms, (iii) an unsaturated alkoxy silane and/or unsaturated alkyl silane wherein the alkoxy or alkyl group is from 1-12 carbon atoms, and (iv) an oxazoline; and about 0 to about 49% by weight of a third optional comonomer selected from at least one of an alkyl acrylate, alkyl methacrylate, vinyl ether, carbon monoxide, and sulfur dioxide, where the alkyl and ether groups are of 1-12 carbon atoms.
    Type: Application
    Filed: July 27, 2001
    Publication date: June 27, 2002
    Inventors: David M. Dean, Richard James Arhart