Patents by Inventor Edmund A. Merriman

Edmund A. Merriman 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).

  • Friction papers comprising PIPD fiber
    Patent number: 8298375
    Abstract: The invention concerns a paper comprising (a) 40 to 70 parts by weight of polypyridobisimidazole fiber, polypyridobisimidazole pulp, or mixtures thereof and (b) 30 to 60 parts by weight of friction modifiers, structural resins, wet-strength resins, processing aids, fillers, and mixtures thereof; the parts by weight being based on the total amount of a) and b) in the paper.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: October 30, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Edmund A. Merriman, Achim Amma
  • Paper comprising PIPD pulp and process for making same
    Patent number: 8137506
    Abstract: The invention concerns a paper comprising polypyridobisimidazole fibers, where the apparent density of the paper is from 0.1 to 0.5 g/cm3 and the tensile strength of the paper in N/cm is at least 0.00057X*Y, where X is the volume portion of polypyridobisimidazole in the total solids of the paper in % and Y is basis weight of the paper in g/m2.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 20, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Edmund A. Merriman, Achim Amma, Mikhail R. Levit, Kevin A. Mulcahy
  • Fibrillated polypyridobisimidazole floc
    Patent number: 7686920
    Abstract: The invention concerns a process for making a fibrillated polypyridobisimidazole floc comprising the steps of: cutting polypyridobisimidazole filaments to an average cut length of from about 0.5 to 10 mm; and applying energy to the polypyridobisimidazole filaments to produce a fibrillated floc having essentially the same average cut length after the application of energy as before the application of energy; where the fibrillated floc having a Canadian Standard Freeness (CSF), when dispersed in water by itself, of from about 400 to 750 ml.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 30, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Mikhail R. Levit, Achim Amma, Edmund A. Merriman
  • Paper Comprising Pipd Pupl and Process for Making Same
    Publication number: 20090236064
    Abstract: The invention concerns a paper comprising polypyridobisimidazole fibers, where the apparent density of the paper is from 0.1 to 0.5 g/cm3 and the tensile strength of the paper in N/cm is at least 0.00057X*Y, where X is the volume portion of polypyridobisimidazole in the total solids of the paper in % and Y is basis weight of the paper in g/m2.
    Type: Application
    Filed: December 19, 2006
    Publication date: September 24, 2009
    Inventors: Edmund A. Merriman, Achim Amma, Mikhail R. Levit, Kevin A. Mulcahy
  • Friction Papers Comprising Pipd Fiber
    Publication number: 20090151884
    Abstract: The invention concerns a paper comprising (a) 40 to 70 parts by weight of polypyridobisimidazole fiber, polypyridobisimidazole pulp, or mixtures thereof and (b) 30 to 60 parts by weight of friction modifiers, structural resins, wet-strength resins, processing aids, fillers, and mixtures thereof; the parts by weight being based on the total amount of a) and b) in the paper.
    Type: Application
    Filed: December 19, 2006
    Publication date: June 18, 2009
    Inventors: Edmund A. Merriman, Achim Amma
  • Self-Bonding Polypridobismidazole Pulp and a Process for Making Same
    Publication number: 20090101295
    Abstract: The invention concerns a fibrous pulp comprising polypyridobisimidazole fiber, the pulp having a Canadian Standard Freeness (CSF) of no more than about 650 ml, a specific surface area of from 0.5 to 50 square meters per gram, a length-weighted average length of from 0.5 to 2.0 mm, and a equilibrium moisture content of greater than 10 percent by weight. Also provided are papers made from such pulp and processes for making the pulp.
    Type: Application
    Filed: December 19, 2006
    Publication date: April 23, 2009
    Inventors: Edmund A. Merriman, Kevin A. Mulcahy, Mikhail R. Levit
  • Fibrillated Polypridobismidazole Floc
    Publication number: 20090078383
    Abstract: The invention concerns a process for making a fibrillated polypyridobisimidazole floc comprising the steps of: cutting polypyridobisimidazole filaments to an average cut length of from about 0.5 to 10 mm; and applying energy to the polypyridobisimidazole filaments to produce a fibrillated floc having essentially the same average cut length after the application of energy as before the application of energy; where the fibrillated floc having a Canadian Standard Freeness (CSF), when dispersed in water by itself, of from about 400 to 750 ml.
    Type: Application
    Filed: December 19, 2006
    Publication date: March 26, 2009
    Inventors: Mikhail R. Levit, Achim Amma, Edmund A. Merriman
  • META- AND PARA-ARAMID PULP AND PROCESSES OF MAKING SAME
    Publication number: 20090029885
    Abstract: The present invention relates to meta- and para-aramid pulp for use as reinforcement material in products such as seals and friction materials. The pulp comprises (a) fibril free meta-aramid particles, (b) irregularly shaped, para-aramid fibrous structures, and (c) water, whereby the para-aramid fibrous structures contact and are wrapped partially around at least some of the meta-aramid particles. The invention further relates to processes for making such aramid pulp.
    Type: Application
    Filed: October 7, 2008
    Publication date: January 29, 2009
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Jill A. Conley, Lenard Oscar Lundblad, Edmund A. Merriman
  • Meta- and para-aramid pulp and processes of making same
    Patent number: 7455750
    Abstract: The present invention relates to meta- and para-aramid pulp for use as reinforcement material in products such as seals and friction materials. The pulp comprises (a) fibril free meta-aramid particles, (b) irregularly shaped, para-aramid fibrous structures, and (c) water, whereby the para-aramid fibrous structures contact and are wrapped partially around at least some of the meta-aramid particles. The invention further relates to processes for making such aramid pulp.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: November 25, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jill A. Conley, Lenard Oscar Lundblad, Edmund A. Merriman
  • Cellulosic and para-aramid pulp and processes of making same
    Publication number: 20050284595
    Abstract: The present invention relates to cellulosic and para-aramid pulp for use as reinforcement material in products such as seals and friction materials. The pulp comprises (a) irregularly shaped, cellulosic fibrous structures, (b) irregularly shaped, para-aramid fibrous structures, and (c) water, whereby cellulosic fibrils and/or stalks are substantially entangled with para-aramid fibrils and/or stalks. The invention further relates to processes for making such cellulosic and aramid pulp.
    Type: Application
    Filed: June 25, 2004
    Publication date: December 29, 2005
    Inventors: Jill Conley, Edmund Merriman
  • Meta- and para-aramid pulp and processes of making same
    Publication number: 20050284596
    Abstract: The present invention relates to meta- and para-aramid pulp for use as reinforcement material in products such as seals and friction materials. The pulp comprises (a) fibril free meta-aramid particles, (b) irregularly shaped, para-aramid fibrous structures, and (c) water, whereby the para-aramid fibrous structures contact and are wrapped partially around at least some of the meta-aramid particles. The invention further relates to processes for making such aramid pulp.
    Type: Application
    Filed: June 25, 2004
    Publication date: December 29, 2005
    Inventors: Jill Conley, Lenard Lundblad, Edmund Merriman
  • Acrylic and para-aramid pulp and processes of making same
    Publication number: 20050287344
    Abstract: The present invention relates to acrylic and para-aramid pulp for use as reinforcement material in products such as seals and friction materials. The pulp comprises (a) irregularly shaped, acrylic fibrous structures, (b) irregularly shaped, para-aramid fibrous structures, and (c) water, whereby acrylic fibrils and/or stalks are substantially entangled with para-aramid fibrils and/or stalks. The invention further relates to processes for making such acrylic and aramid pulp.
    Type: Application
    Filed: June 25, 2004
    Publication date: December 29, 2005
    Inventors: Jill Conley, Edmund Merriman