Patents by Inventor Nagayoshi Kobayashi

Nagayoshi Kobayashi 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).

  • Lubricant and magnetic disk
    Patent number: 8980450
    Abstract: A lubricant containing a compound (A) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a polar group at each of opposite terminals thereof, and a compound (B) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a nonpolar group at at least one terminal thereof —(CF2CF2CF2O)a-??(1) wherein a is a real number of 5 to 30.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: March 17, 2015
    Assignee: MORESCO Corporation
    Inventor: Nagayoshi Kobayashi
  • Cyclophosphazene compound, lubricant comprising same, and magnetic disk
    Patent number: 8936859
    Abstract: A cyclophosphazene compound of the formula (I), and lubricants and magnetic disks using the compound wherein n is 2, 3 or 4, m is an integer of 1 to 12, R is C1-4 fluoroalkyl and Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2— in which x, y and z are each 0 or a positive real number to give a number average molecular weight of 500 to 4000 to a fluoropolyether of the formula HOCH2—Rf—CH2OH including said Rf, the fluoropolyether having a molecular weight distribution (PD) of 1.0 to 1.5.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: January 20, 2015
    Assignee: Moresco Corporation
    Inventors: Tsuyoshi Shimizu, Nagayoshi Kobayashi
  • LUBRICANT AND MAGNETIC DISK
    Publication number: 20140147699
    Abstract: A lubricant containing a compound (A) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a polar group at each of opposite terminals thereof, and a compound (B) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a nonpolar group at at least one terminal thereof —(CF2CF2CF2O)a-??(1) wherein a is a real number of 5 to 30.
    Type: Application
    Filed: January 30, 2014
    Publication date: May 29, 2014
    Applicant: MORESCO Corporation
    Inventor: Nagayoshi KOBAYASHI
  • Fluoropolyether compound, lubricant and magnetic disk each containing the same
    Patent number: 8734966
    Abstract: A compound of the formula (1), lubricant containing the compound and magnetic disk R1—C6H4O—CH2CH(OH)CH2OCH2—R2—CH2—O—R3??(1) wherein R1 is hydrogen, alkoxyl having 1 to 4 carbon atoms, amino or amido, R2 is —CF2O(CF2CF2O)x(CF2O)yCF2—, —CF2CF2O(CF2CF2CF2O)z—CF2CF2— or —CF2CF2CF2O(CF2CF2CF2CF2O)nCF2CF2CF2—, x and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 4, R3 is —CH2CH(OH)CH2OH, —CH2CH(OH)CH2OCH2CH(OH)CH2OH or —(CH2)mOH, m is an integer of 2 to 6.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: May 27, 2014
    Assignee: Moresco Corporation
    Inventors: Ryosuke Sagata, Tsuyoshi Shimizu, Tomomi Hatta, Nagayoshi Kobayashi
  • Lubricant and magnetic disk
    Patent number: 8679656
    Abstract: A lubricant containing a compound of the formula (I) wherein n is substantially 2, 3 or 4, R is C1-4 fluoroalkyl and Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2— in which x, y and z are each 0 or a positive real number to give a number average molecular weight of 500 to 2000 to a fluoropolyether of the formula HOCH2—Rf—CH2OH including said Rf, the fluoropolyether having a molecular weight distribution (PD, weight average molecular weight/number average molecular weight) of 1.0 to 1.5.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: March 25, 2014
    Assignee: Moresco Corporation
    Inventors: Nagayoshi Kobayashi, Tsuyoshi Shimizu
  • Lubricant and magnetic disk
    Patent number: 8679655
    Abstract: A lubricant containing a compound (A) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a polar group at each of opposite terminals thereof, and a compound (B) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a nonpolar group at least one terminal thereof —(CF2CF2CF2O)a-??(1) wherein a is a real number of 5 to 30.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: March 25, 2014
    Assignee: Moresco Corporation
    Inventor: Nagayoshi Kobayashi
  • Fluoropolyether compound, lubricant and magnetic disk each containing the same
    Patent number: 8668995
    Abstract: A compound of the formula (1), lubricant containing the compound and magnetic disk C6H4—(O—Z—R—X)2??(1) wherein Z is —CH2CH2O— or —CH2CH(OH)CH2O—, R is —CH2CF2CF2CF2O(CF2CF2CF2CF2O)nCF2CF2CF2CH2—, n is a real number of 0 to 20, X is —OH, —O(CH2)mOH, —OCH2CH(OH)CH2OH, —OCH2CH(OH)CH2O—C6H5 or —OCH2CH(OH)CH2O—C6H4—OCH3, m is an integer of 1 to 6.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: March 11, 2014
    Assignee: Moresco Corporation
    Inventors: Tsuyoshi Shimizu, Nagayoshi Kobayashi
  • CYCLOPHOSPHAZENE COMPOUND, LUBRICANT CONTAINING SAME, AND MAGNETIC DISK
    Publication number: 20140065443
    Abstract: A compound of the formula (1), lubricant containing the compound and magnetic disk (P3N3)—[R1-R2]6??(1) wherein R1 is —OCH2CF2O(CF2CF2O)x(CF2O)yCF2CH2O—, or —OCH2CF2CF2O(CF2CF2CF2O)ZCF2CH2O— or —OCH2CF2CF2CF2O(CF2CF2CF2CF2O)nCF2CF2CF2CH2O—, x and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 20, R2 is hydrogen, hydroxyalkyl, amino or amido.
    Type: Application
    Filed: July 24, 2013
    Publication date: March 6, 2014
    Applicant: MORESCO Corporation
    Inventors: Ryosuke SAGATA, Nagayoshi KOBAYASHI
  • CYCLOPHOSPHAZENE COMPOUND, LUBRICANT COMPRISING SAME, AND MAGNETIC DISK
    Publication number: 20130034749
    Abstract: A cyclophosphazene compound of the formula (I), and lubricants and magnetic disks using the compound wherein n is 2, 3 or 4, m is an integer of 1 to 12, R is C1-4 fluoroalkyl and Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2— in which x, y and z are each 0 or a positive real number to give a number average molecular weight of 500 to 4000 to a fluoropolyether of the formula HOCH2-Rf-CH2OH including said Rf, the fluoropolyether having a molecular weight distribution (PD) of 1.0 to 1.5.
    Type: Application
    Filed: April 20, 2011
    Publication date: February 7, 2013
    Inventors: Tsuyoshi Shimizu, Nagayoshi Kobayashi
  • FLUOROPOLYETHER COMPOUND, LUBRICANT AND MAGNETIC DISK EACH CONTAINING THE SAME
    Publication number: 20120315504
    Abstract: A compound of the formula (1), lubricant containing the compound and magnetic disk C6H4—(O—Z—R—X)2??(1) wherein Z is —CH2CH2O— or —CH2CH(OH)CH2O—, R is —CH2CF2CF2CF2O(CF2CF2CF2CF2O)nCF2CF2CF2CH2—, n is a real number of 0 to 20, X is —OH, —O(CH2)mOH, —OCH2CH(OH)CH2OH, —OCH2CH(OH)CH2O—C6H5 or —OCH2CH(OH)CH2O—C6H4—OCH3, m is an integer of 1 to 6.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 13, 2012
    Inventors: Tsuyoshi SHIMIZU, Nagayoshi KOBAYASHI
  • Perfluoropolyether compound, and lubricant and magnetic disk each using the same
    Patent number: 8039132
    Abstract: A compound of the formula (I), and lubricant, and magnetic disk each using the same A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A??(I) wherein n is an integer of 1 to 4, A is a group of the formula (a) below, and B is a group of the formula (b) below, p being 1 or 2, R being C1-4 fluoroalkyl, Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2—, x, y and z being each a real number of 0 to 50.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: October 18, 2011
    Assignee: Moresco Corporation
    Inventors: Tsuyoshi Shimizu, Kazunori Shirai, Nagayoshi Kobayashi
  • LUBRICANT AND MAGNETIC DISK
    Publication number: 20110143165
    Abstract: A lubricant containing a compound of the formula (I) wherein n is substantially 2, 3 or 4, R is C1-4 fluoroalkyl and Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2— in which x, y and z are each 0 or a positive real number to give a number average molecular weight of 500 to 2000 to a fluoropolyether of the formula HOCH2—Rf—CH2OH including said Rf, the fluoropolyether having a molecular weight distribution (PD, weight average molecular weight/number average molecular weight) of 1.0 to 1.5.
    Type: Application
    Filed: September 3, 2009
    Publication date: June 16, 2011
    Applicant: MORESCO CORPORATION
    Inventors: Nagayoshi Kobayashi, Tsuyoshi Shimizu
  • LUBRICANT AND MAGNETIC DISK
    Publication number: 20100239887
    Abstract: A lubricant containing a compound (A) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a polar group at each of opposite terminals thereof, and a compound (B) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a nonpolar group at least one terminal thereof —(CF2CF2CF2O)a-??(1) wherein a is a real number of 5 to 30.
    Type: Application
    Filed: November 18, 2008
    Publication date: September 23, 2010
    Inventor: Nagayoshi Kobayashi
  • Perfluoropolyether compound, and lubricant and magnetic disk each using the same
    Publication number: 20100136371
    Abstract: A compound of the formula (I), and lubricant, and magnetic disk each using the same A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A??(I) wherein n is an integer of 1 to 4, A is a group of the formula (a) below, and B is a group of the formula (b) below, p being 1 or 2, R being C1-4 fluoroalkyl, Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)nCF2CF2—, x, y and z being each a real number of 0 to 50.
    Type: Application
    Filed: May 9, 2008
    Publication date: June 3, 2010
    Inventors: Tsuyoshi Shimizu, Kazunori Shirai, Nagayoshi Kobayashi
  • Perfluoropolyether compound and lubricant and magnetic disk using same
    Publication number: 20060052262
    Abstract: A compound of the formula (I), a lubricant and a magnetic disk using the compound A—CH2CF2O(CF2CF2O)m-(CF2O)n-CF2CH2—B ??(I) wherein A is amino group having hydroxyl group, B is hydroxyl group, or amino group having or not having hydroxyl group, wherein m is a real number of 5 to 36, and n is a real number of from 4 to 30.
    Type: Application
    Filed: October 1, 2003
    Publication date: March 9, 2006
    Applicant: MATSUMURA OIL RESEARCH CORP.
    Inventors: Tamio Akada, Nagayoshi Kobayashi, Yoshinobu Fujii
  • Phosphazene compounds and lubricants containing the same
    Patent number: 6608009
    Abstract: A phosphazene compound of the formula (1) or (5) which has an arrangement such that perfluoroxyalkylene units selected from —CF2O— and —CF2CF2O— are randomly distributed, the compound having a functional terminal group A or group G A—OCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2O—A  (1) G—[OCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2OH]6-z  (5) wherein A is a group of the formula (a) and G is a group of the formula (g) shown in the specification, and a lubricant containing at least one of the phosphazene compounds of the formulas (1) and (5).
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: August 19, 2003
    Assignee: Matsumura Oil Research Corp.
    Inventors: Tamio Akada, Yoshinobu Fujii, Nagayoshi Kobayashi, Rie Fujimoto
  • Lubricant for magnetic recording medium
    Patent number: 6541431
    Abstract: The present invention provides a lubricant for magnetic recording medium which comprises, as an effective component, a phosphazene compound of formula [N═P[O(C6H4)—(A)z—R]a[OCH2—(B)xH]b]y  (1) wherein A is —C6H4— or —OC6H4—, B is fluorine-containing alkylene group, R is hydrogen atom, fluorine atom, C1-4 alkyl, C1-4 alkoxy or C1-4 haloalkyl, a and b are a real number of 0 to 2, satisfying a+b=2, x is 1, 2, 3 or 4, y is 3 or 4, and z is 0 or 1.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: April 1, 2003
    Assignee: Matsumura Oil Research Corp.
    Inventors: Tamio Akada, Yoshinobu Fujii, Nagayoshi Kobayashi, Rie Fujimoto
  • Phosphazene compounds and lubricants containing the same
    Publication number: 20020183211
    Abstract: A phosphazene compound of the formula (1) or (5) which has an arrangement such that perfluoroxyalkylene units selected from —CF2O— and —CF2CF2O— are randomly distributed, the compound having a functional terminal group A or group G
    Type: Application
    Filed: March 20, 2002
    Publication date: December 5, 2002
    Inventors: Tamio Akada, Yoshinobu Fujii, Nagayoshi Kobayashi, Rie Fujimoto