Patents by Inventor Achim Amma
Achim Amma 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).
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Patent number: 8444817Abstract: The present invention relates to thermoset and polyareneazole pulp for use as reinforcement material in products including for example fluid seals and friction materials, as a processing aid including its use as a thioxotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoset fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water whereby thermoset fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoset and polyareneazole pulp.Type: GrantFiled: April 13, 2010Date of Patent: May 21, 2013Assignee: E I du Pont de Nemours and CompanyInventor: Achim Amma
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Patent number: 8444816Abstract: The present invention relates to thermoplastic and polyareneazole pulp for use as reinforcement material in products including for example fluid sealing materials, as a processing aid including its use as a thixotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoplastic fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water, whereby thermoplastic fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoplastic and polyareneazole pulp.Type: GrantFiled: April 13, 2010Date of Patent: May 21, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Achim Amma, Stephen D. Maloney, Mikhail R. Levit
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Patent number: 8444815Abstract: The present invention relates to fibrous pulp comprising a combination of polypyridobisimidazole fibrous structures and fibrous structures derived from another polymer. The invention further relates to processes for making such pulp and articles comprising the pulp.Type: GrantFiled: April 13, 2010Date of Patent: May 21, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Achim Amma, Kevin A. Mulcahy
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Patent number: 8406589Abstract: A process for forming a fiber optical cable assembly comprises the steps of (a) subjecting a first high tenacity reinforcement yarn such as para-aramid that is coated with a water-impermeable thermally reversible cross-linked polymeric coating to a temperature of from 45 to 200 ° C. for sufficient time to convert the protective coating via bond cleavage into a water-swellable super absorbent polymer, (b) combining one or more of the first reinforcement yarns from step (a) with one or more optical glass fiber transmission media and (c) applying a protective sleeve over at least one assembly of step (b).Type: GrantFiled: January 26, 2010Date of Patent: March 26, 2013Assignee: E I du Pont de Nemours and CompanyInventor: Achim Amma
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Patent number: 8404082Abstract: The present invention relates to wood pulp and polyareneazole pulp for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The pulp comprises (a) irregularly shaped, wood pulp fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures, and (c) water, whereby wood pulp fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such wood pulp and polyareneazole pulp.Type: GrantFiled: April 13, 2010Date of Patent: March 26, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Achim Amma, Mikhail R Levit
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Patent number: 8298375Abstract: 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: GrantFiled: December 19, 2006Date of Patent: October 30, 2012Assignee: E I du Pont de Nemours and CompanyInventors: Edmund A. Merriman, Achim Amma
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Patent number: 8211272Abstract: The present invention relates to para-aramid pulp including meta-aramid fibrids for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The invention further relates to processes for making such pulp.Type: GrantFiled: May 6, 2010Date of Patent: July 3, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: Mikhail R. Levit, Achim Amma
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Patent number: 8137506Abstract: 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: GrantFiled: December 19, 2006Date of Patent: March 20, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: Edmund A. Merriman, Achim Amma, Mikhail R. Levit, Kevin A. Mulcahy
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Publication number: 20110182553Abstract: A process for forming a fiber optical cable assembly comprises the steps of (a) subjecting a first high yenacity reinforcement yarn such as para-aramid that is coated with a water-impermeable thermally reversible cross-linked polymeric coating to a temperature of from 45 to 200° C. for sufficient time to convert the protective coating via bond cleavage into a water-swellable super absorbent polymer, (b) combining one or more of the first reinforcement yarns from step (a) with one or more optical glass fiber transmission media and (c) applying a protective sleeve over at least one assembly of step (b).Type: ApplicationFiled: January 26, 2010Publication date: July 28, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: Achim Amma
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Patent number: 7950420Abstract: A flexible hose for conveying fluids or gases comprises two elastomeric layers surrounding either side of a reinforcement layer.Type: GrantFiled: June 27, 2008Date of Patent: May 31, 2011Assignee: E. I. du Pont de Nemours and CompanyInventors: Achim Amma, Andreas Graudus
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Publication number: 20100212851Abstract: The present invention relates to para-aramid pulp including meta-aramid fibrids for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The invention further relates to processes for making such pulp.Type: ApplicationFiled: May 6, 2010Publication date: August 26, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Mikhail R. Levit, Achim Amma
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Publication number: 20100200183Abstract: The present invention relates to wood pulp and polyareneazole pulp for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The pulp comprises (a) irregularly shaped, wood pulp fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures, and (c) water, whereby wood pulp fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such wood pulp and polyareneazole pulp.Type: ApplicationFiled: April 13, 2010Publication date: August 12, 2010Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: ACHIM AMMA, Mikhail R. Levit
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Publication number: 20100193145Abstract: The present invention relates to thermoset and polyareneazole pulp for use as reinforcement material in products including for example fluid seals and friction materials, as a processing aid including its use as a thioxotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoset fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water whereby thermoset fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoset and polyareneazole pulp.Type: ApplicationFiled: April 13, 2010Publication date: August 5, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: ACHIM AMMA
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Publication number: 20100193144Abstract: The present invention relates to thermoplastic and polyareneazole pulp for use as reinforcement material in products including for example fluid sealing materials, as a processing aid including its use as a thixotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoplastic fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water, whereby thermoplastic fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoplastic and polyareneazole pulp.Type: ApplicationFiled: April 13, 2010Publication date: August 5, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: ACHIM AMMA, Stephen D. Maloney, Mikhail R. Levit
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Publication number: 20100193143Abstract: The present invention relates to fibrous pulp comprising a combination of polypyridobisimidazole fibrous structures and fibrous structures derived from another polymer.Type: ApplicationFiled: April 13, 2010Publication date: August 5, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: ACHIM AMMA, Kevin A. Mulcahy
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Patent number: 7744724Abstract: The present invention relates to thermoplastic and polyareneazole pulp for use as reinforcement material in products including for example fluid sealing materials, as a processing aid including its use as a thixotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoplastic fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water, whereby thermoplastic fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoplastic and polyareneazole pulp.Type: GrantFiled: December 15, 2006Date of Patent: June 29, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Achim Amma, Stephen D. Maloney, Mikhail R. Levit
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Patent number: 7740741Abstract: The present invention relates to para-aramid pulp including meta-aramid fibrids for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The invention further relates to processes for making such pulp.Type: GrantFiled: December 15, 2006Date of Patent: June 22, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Mikhail R. Levit, Achim Amma
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Patent number: 7727358Abstract: The present invention relates to fibrous pulp comprising a combination of polypyridobisimidazole fibrous structures and fibrous structures derived from another polymer. The invention further relates to processes for making such pulp and articles comprising the pulp.Type: GrantFiled: December 15, 2006Date of Patent: June 1, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Achim Amma, Kevin A. Mulcahy
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Patent number: 7727357Abstract: The present invention relates to thermoset and polyareneazole pulp for use as reinforcement material in products including for example fluid seals and friction materials, as a processing aid including its use as a thioxotrope, and as a filter material. The pulp comprises (a) irregularly shaped, thermoset fiber fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures and (c) water whereby thermoset fiber fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such thermoset and polyareneazole pulp.Type: GrantFiled: December 15, 2006Date of Patent: June 1, 2010Assignee: E. I. du Pont de Nemours and CompanyInventor: Achim Amma
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Patent number: 7727356Abstract: The present invention relates to wood pulp and polyareneazole pulp for use as reinforcement material in products including for example friction materials, fluid sealing materials, and papers. The pulp comprises (a) irregularly shaped, wood pulp fibrous structures, (b) irregularly shaped, polyareneazole fibrous structures, and (c) water, whereby wood pulp fibrils and/or stalks are substantially entangled with polyareneazole fibrils and/or stalks. The invention further relates to processes for making such wood pulp and polyareneazole pulp.Type: GrantFiled: December 15, 2006Date of Patent: June 1, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Achim Amma, Mikhail R. Levit