Patents Represented by Attorney James J. Mullen
  • Patent number: 8207278
    Abstract: A composition of matter consisting of a stable solution containing a polymer derived from a solution of a polymer containing trace metals, the derived method comprising the steps of: (a) providing a polymer solution containing a polymer, a first solvent and trace metals; (b) passing said polymer solution through an acidic cation ion exchange material to remove said trace metals therefrom and thereby forming a polymer solution containing free acid radicals; (c) precipitating said polymer from said polymer solution of step b by contacting with a second solvent wherein the polymer is substantially insoluble therein; (d) filtering said solution and said second solvent to thereby form a solid polymer cake; and (e) contacting said cake from step d with sufficient quantities of additional said second solvent in order to remove free acid radicals there from.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: June 26, 2012
    Assignee: Dupont Electronic Polymers LP
    Inventors: William Richard Russell, John Anthony Schultz
  • Patent number: 8162157
    Abstract: The present invention provides a unique compound bow stand and quiver holder which is quickly collapsible and stored and transported in an easy manner for persons in the archery industry and field.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: April 24, 2012
    Assignee: Bowsaver Inc
    Inventors: Stanley Neil Brown, Kenneth Earl Johnson
  • Patent number: 8163464
    Abstract: A process for preparing proponates which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) replacing the methanol in said ether containing solution with a second solvent and (iv) reacting the ether containing ethyl lactate solution with a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form said propanoates. New compositions of matter which comprise the propanoates, prepared in the above manner, have application in the electronic chemicals market such as in a photoresist composition.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: April 24, 2012
    Assignee: Du Pont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, James R. Sounik, George W. Clark, III
  • Patent number: 7897697
    Abstract: A process for preparing derivatized poly(4-hydroxystryrene) having a novolak type structure which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) polymerizing said ether containing solution in the presence of a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form a novolak type polymer.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: March 1, 2011
    Assignee: DuPont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, Edward G. Zey
  • Patent number: 7862983
    Abstract: A composition of matter consisting of a stable solution containing a polymer derived from a solution of a polymer containing trace metals, the derived method comprising the steps of: (a) providing a polymer solution containing a polymer, a first solvent and trace metals; (b) passing said polymer solution through an acidic cation ion exchange material to remove said trace metals therefrom and thereby forming a polymer solution containing free acid radicals; (c) precipitating said polymer from said polymer solution of step b by contacting with a second solvent wherein the polymer is substantially insoluble therein; (d) filtering said solution and said second solvent to thereby form a solid polymer cake; and (e) contacting said cake from step d with sufficient quantities of additional said second solvent in order to remove free acid radicals therefrom.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: January 4, 2011
    Assignee: DuPont Electronic Polymers L.P.
    Inventors: William Richard Russell, John Anthony Schultz
  • Patent number: 7741429
    Abstract: A method of making a stable photoresist solution containing a polymer from a solution of a polymer containing trace metals, said method comprising the steps of: (a) providing a polymer solution containing a polymer, a first solvent and trace metals; (b) passing said polymer solution through an acidic cation ion exchange material to remove said trace metals therefrom and thereby forming a polymer solution containing free acid radicals; (c) precipitating said polymer from said polymer solution of step b by contacting with a second solvent wherein the polymer is substantially insoluble therein; (d) filtering said solution and said second solvent to thereby form a solid polymer cake; (e) contacting said cake from step d with sufficient quantities of additional said second solvent in order to remove free acid radicals therefrom; (f) adding a compatible photoresist solvent to said solid polymer cake from step e and mixing the two in order to dissolve said polymer in said photoresist solvent and thereby forming a
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: June 22, 2010
    Assignee: DuPont Electronic Polymers L.P.
    Inventors: William Richard Russell, John Anthony Schultz
  • Patent number: 7728082
    Abstract: A process for producing a stable polymer such as poly(hydroxystyrene) which comprises the decarboxylation of a corresponding phenolic in the presence of a non-amine basic catalyst and a polar organic solvent, followed by the polymerization thereof.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: June 1, 2010
    Assignee: DuPont Electronic Polymers L.P.
    Inventors: Keith Joseph Kunitsky, Michael Thomas Sheehan, James Ralph Sounik, Mark Elliot Wagman
  • Patent number: 7670993
    Abstract: A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, detergent and acid. This one step method provides for the simultaneously cleaning/removal of asphaltene and/or paraffin and scale. This method can be used alone or with the assistance of a wash tool which is a combination pressure and surge wash tool having a nipple assembly. A by-pass port is coupled to the nipple assembly and a diverter cup is coupled to the by-pass port. A plurality of pressure wash cups are positioned on the tool. A pressure wash port is located between the plurality of pressure wash cups and a pump shoe assembly is coupled to a bottom pressure wash cup.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: March 2, 2010
    Inventor: Richard J. Dyer
  • Patent number: 7662538
    Abstract: A process for preparing a blocked derivatized poly(4-hydroxystryrene)-DPHS having a novolak type structure which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) polymerizing said ether containing solution in the presence of a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form a novolak type polymer; and (iv) reacting said polymer with a vinyl ether, a dialkyl dicarbonate, or a mixture of vinyl ether and a dialkyl dicarbonate to form the blocked DPHS.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: February 16, 2010
    Assignee: Du Pont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, Edward G. Zey, Hiroshi Okazaki
  • Patent number: 7632785
    Abstract: A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, and detergent. This one step method provides for the simultaneously cleaning/removal of asphaltene and/or paraffin and scale. This method can be used alone or with the assistance of a wash tool which is a combination pressure and surge wash tool having a nipple assembly. A by-pass port is coupled to the nipple assembly and a diverter cup is coupled to the by-pass port. A plurality of pressure wash cups are positioned on the tool. A pressure wash port is located between the plurality of pressure wash cups and a pump shoe assembly is coupled to a bottom pressure wash cup.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: December 15, 2009
    Inventor: Richard J. Dyer
  • Patent number: 7632896
    Abstract: A process for preparing derivatized poly(4-hydroxystryrene) having a novolak type structure which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) polymerizing said ether containing solution in the presence of a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form a novolak type polymer.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: December 15, 2009
    Assignee: Dupont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, Edward G. Zey
  • Patent number: 7566752
    Abstract: A process for preparing derivatized poly(4-hydroxystryrene) having a novolak type structure which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) polymerizing said ether containing solution in the presence of a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form a novolak type polymer.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: July 28, 2009
    Assignee: Du Pont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, Edward G. Zey
  • Patent number: 7521526
    Abstract: A process for producing a stable polymer such as poly(hydroxystyrene) which comprises the decarboxylation of a corresponding phenolic in the presence of a non-amine basic catalyst and a polar organic solvent, followed by the polymerization thereof.
    Type: Grant
    Filed: July 21, 2007
    Date of Patent: April 21, 2009
    Assignee: Dupont Electronic Polymers L.P.
    Inventors: Keith Joseph Kunitsky, Michael Thomas Sheehan, James Ralph Sounik, Mark Elliot Wagman
  • Patent number: 7497261
    Abstract: A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, and detergent. This one step method provides for the simultaneously cleaning/removal of asphaltene and/or paraffin and scale. This method can be used alone or with the assistance of a wash tool which is a combination pressure and surge wash tool having a nipple assembly. A by-pass port is coupled to the nipple assembly and a diverter cup is coupled to the by-pass port. A plurality of pressure wash cups are positioned on the tool. A pressure wash port is located between the plurality of pressure wash cups and a pump shoe assembly is coupled to a bottom pressure wash cup.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: March 3, 2009
    Inventor: Richard J. Dyer
  • Patent number: 7371800
    Abstract: A process for preparing derivatized poly(4-hydroxystryrene) having a novolak type structure which comprises the steps of (i) supplying a solution of methanol containing 4-hydroxyphenylmethylcarbinol, (ii) subjecting said solution to an acid catalyzed displacement reaction for a sufficient period of time and under suitable conditions of temperature and pressure to convert substantially all of said carbinol to 4-hydroxyphenylmethylcarbinol methyl ether in solution, (iii) polymerizing said ether containing solution in the presence of a suitable acid catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form a novolak type polymer.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: May 13, 2008
    Assignee: DuPont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, Edward G. Zey
  • Patent number: 7312281
    Abstract: An anhydrous, liquid phase process for preparing hydroxyl containing polymers of enhanced purity comprising the steps of polymerization, purification, transesterification, purification, catalyst removal, and solvent exchange. The resultant polymer in solution can be used directly, without further processing steps, to prepare a photoresist composition.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: December 25, 2007
    Assignee: DuPont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, James R. Sounik
  • Patent number: 7296627
    Abstract: A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, detergent and mineral acid. This one step method provides for the simultaneously cleaning/removal of asphaltine and/or paraffin and scale. This method can be used alone or with the assistance of a wash tool which is a combination pressure and surge wash tool having a nipple assembly. A by-pass port is coupled to the nipple assembly and a diverter cup is coupled to the by-pass port. A plurality of pressure wash cups are positioned on the tool. A pressure wash port is located between the plurality of pressure wash cups and a pump shoe assembly is coupled to a bottom pressure wash cup.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: November 20, 2007
    Inventor: Richard J. Dyer
  • Patent number: 7148320
    Abstract: Polymers derived from various monomers are purified by fractionalization of the crude polymers in a solvent/non solvent system via reverse precipitation.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: December 12, 2006
    Assignee: Dupont Electronic Polymers L.P.
    Inventors: Michael T. Sheehan, James R. Sounik
  • Patent number: 6864324
    Abstract: An anhydrous, liquid phase process for preparing hydroxyl containing polymers of enhanced purity comprising the steps of polymerization, purification, transesterification, purification, catalyst removal, and solvent exchange. The resultant polymer in solution can be used directly, without further processing steps, to prepare a photoresist composition.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: March 8, 2005
    Assignee: Chem First Electronic Materials L.P.
    Inventors: Michael T. Sheehan, James R. Sounik
  • Patent number: 6787611
    Abstract: Polymers derived from 4-acyloxystyrene are purified by fractionalization plus heating and cooling of the polymers in alcoholic solvents.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: September 7, 2004
    Assignee: Chemfirst Electronic Materials L.P.
    Inventor: Michael T. Sheehan