Patents by Inventor Annakutty Mathew
Annakutty Mathew 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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Publication number: 20220169850Abstract: Provided herein are polyamide compositions having a combination of specific physical properties that enable the molding of articles comprising at least one annular connector or barb of specific dimensions for attachment of hoses to the article. Further provided are processes to prepare these compositions and articles prepared from the compositions.Type: ApplicationFiled: April 10, 2020Publication date: June 2, 2022Inventors: Annakutty Mathew, Masahiro Nozaki, Toshikazu Kobayashi, Mark Wichmann
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Publication number: 20200247951Abstract: A polyamide composition comprising: (a) 30 to about 60 weight percent of at least one semi-aromatic polyamide comprising: (i) 63 to about 70 mole percent hexamethylene terephthalamide repeat units; and (ii) about 30 to about 37 mole percent hexamethylene decanamide or hexamethylene dodecanamide repeat units; (b) 3 to 30 weight percent of at least one flame retardant; (c) 0.02 to 0.65 weight percent of a lubricant; (d) 5 to 50 weight percent of at least one inorganic reinforcing agent; (e) 0 to 5 weight percent of a nucleant; and (f) 0.2 to 10 weight percent of at least one flame retardant synergist. Such compositions exhibit a combination of a molding cooling time of less than or equal to 9 seconds; a reflow peak temperature of at least 270° C.; and a flammability of V-0 measured according to UL-94 flammability test.Type: ApplicationFiled: August 30, 2018Publication date: August 6, 2020Inventors: Annakutty Mathew, Masahiro Nozaki
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Patent number: 8349932Abstract: Disclosed is a polyamide composition including at least one semi-aromatic copolyamide, said semi-aromatic copolyamide consisting essentially of about 25 to about 55 mole percent repeat units of the formula —C(O)(CH2)mC(O)NHCH2ArCH2NH—??(I) and about 45 to about 75 mole percent repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)nNH—??(II) wherein m is 8, 10, and/or 12, n is 6, 10 and/or 12 and Ar is a meta-substituted benzene ring; and said polyamide has a melting point equal to or less than 225° C.; and 0.25 to 20 weight percent of one or more polyhydroxy polymer(s) having a number average molecular weight of at least 2000 and selected from the group consisting of ethylene/vinyl alcohol copolymer and poly(vinyl alcohol). Also disclosed are molded or extruded articles including the polyamide composition.Type: GrantFiled: January 28, 2011Date of Patent: January 8, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Shailesh Ratilal Doshi, Annakutty Mathew, Marvin M. Martens
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Patent number: 8211517Abstract: Multi-layered co-extruded tubes are provided that include an outer layer including a first semiaromatic semicrystalline polyamide having a melt temperature of about 240° C. to 280° C., and a thermal stabilizer; and an inner layer including a second semiaromatic semicrystalline polyamide having a glass transition equal to or greater than 100° C.Type: GrantFiled: June 3, 2010Date of Patent: July 3, 2012Assignee: EI du Pont de Nemours and CompanyInventors: Marvin M. Martens, Annakutty Mathew, Georgios Topoulos
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Publication number: 20120029134Abstract: Disclosed is a polyamide composition including at least one semi-aromatic copolyamide, said semi-aromatic copolyamide consisting essentially of about 25 to about 55 mole percent repeat units of the formula —C(O)(CH2)mC(O)NHCH2ArCH2NH—??(I) and about 45 to about 75 mole percent repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)2NH—(II) wherein m is 8, 10, and/or 12, n is 6, 10 and/or 12 and Ar is a meta-substituted benzene ring; and said polyamide has a melting point equal to or less than 225° C.; and 0.1 to 15 weight percent of one or more polyhydric alcohols having more than two hydroxyl groups and having a number average molecular weight (Mn) of less than 2000. Also disclosed are molded or extruded articles including the polyamide composition.Type: ApplicationFiled: January 28, 2011Publication date: February 2, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: SHAILESH RATILAL DOSHI, Annakutty Mathew, Marvin M. Martens
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Publication number: 20110190433Abstract: Disclosed is a polyamide composition including at least one semi-aromatic copolyamide, said semi-aromatic copolyamide consisting essentially of about 25 to about 55 mole percent repeat units of the formula —C(O)(CH2)mC(O)NHCH2ArCH2NH—??(I) and about 45 to about 75 mole percent repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)nNH—??(II) wherein m is 8, 10, and/or 12, n is 6, 10 and/or 12 and Ar is a meta-substituted benzene ring; and said polyamide has a melting point equal to or less than 225° C.; and 0.25 to 20 weight percent of one or more polyhydroxy polymer(s) having a number average molecular weight of at least 2000 and selected from the group consisting of ethylene/vinyl alcohol copolymer and poly(vinyl alcohol). Also disclosed are molded or extruded articles including the polyamide composition.Type: ApplicationFiled: January 28, 2011Publication date: August 4, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Shailesh Ratilal Doshi, Annakutty Mathew, Marvin M. Martens
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Publication number: 20110052848Abstract: Polyamides made from 1,6-hexanediamine, and the dicarboxylic acids 1,10-decandioic acid, 1,12-dodecanedioic acid, or 1,14-tetradecanedioic acid and terephthalic acid in specified proportions are particularly resistant to salt stressed (induced) corrosion cracking. This makes them particularly useful as vehicular parts which may be exposed to salts. Particularly when these polyamides contain tougheners and/or plasticizers they are especially useful for hoses and tubes.Type: ApplicationFiled: September 1, 2010Publication date: March 3, 2011Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: SHAILESH RATILAL DOSHI, MARVIN M. MARTENS, ANNAKUTTY MATHEW, STEVEN A. MESTEMACHER
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Publication number: 20100307626Abstract: Multi-layered co-extruded tubes are provided that include an outer layer including a first semiaromatic semicrystalline polyamide having a melt temperature of about 240° C. to 280° C., and a thermal stabilizer; and an inner layer including a second semiaromatic semicrystalline polyamide having a glass transition equal to or greater than 100° C.Type: ApplicationFiled: June 4, 2010Publication date: December 9, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Marvin M. Martens, Annakutty Mathew, Georgios Topoulos
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Publication number: 20100307625Abstract: Multi-layered co-extruded tubes are provided that include an outer layer including a first semiaromatic semicrystalline polyamide having a melt temperature of about 240° C. to 280° C., and a thermal stabilizer; and an inner layer including a second semiaromatic semicrystalline polyamide having a glass transition equal to or greater than 100° C.Type: ApplicationFiled: June 3, 2010Publication date: December 9, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Marvin M. Martens, Annakutty Mathew, Georgios Topoulos
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Publication number: 20100233402Abstract: Polyamides made from 1,6-hexanediamine, and the dicarboxylic acids 1,10-decandioic acid and/or 1,12-dodecanedioic acid, and terephthalic acid in specified proportions are particularly resistant to salt stressed (induced) corrosion cracking. This makes them particularly useful as vehicular parts which may be exposed to salts. Particularly when these polyamides contain tougheners and/or plasticizers they are especially useful for hoses and tubes.Type: ApplicationFiled: March 10, 2010Publication date: September 16, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Shailesh Ratilal Doshi, Marvin M. Martens, Annakutty Mathew, Steven A. Mestemacher