Patents by Inventor Hiroaki Koshima

Hiroaki Koshima 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).

  • Patent number: 9803155
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amine-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein, wherein the component (A) contains, based on the total amount of the composition, a zinc primary dialkyldithiophosphate in an amount of from 0.005% by mass to 0.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: October 31, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Hiroaki Koshima, Moritsugu Kasai, Yoko Ogahara, Masanori Tsujioka, Koji Miyake
  • Publication number: 20170198232
    Abstract: Through a lubricating oil additive including an amide compound represented by the following general formula (1) and a lubricating oil composition using the same, a lubricating oil additive and a lubricating oil composition exhibiting not only a high intermetal friction coefficient but also excellent intermetal friction-coefficient/slipping-velocity characteristics are provided. Ra—CO—(NH-L1)n-NRbRc ??(1) In the formula, Ra is a straight-chain alkyl group having 8 to 22 carbon atoms or a branched-chain alkyl group having 8 to 22 carbon atoms, or a straight-chain alkenyl group having 8 to 22 carbon atoms or a branched-chain alkenyl group having 8 to 22 carbon atoms; L1 is an alkylene group having 1 to 6 carbon atoms; n is an integer of 1 to 4; and —NRbRc is a primary amino group or a piperazyl group.
    Type: Application
    Filed: June 24, 2015
    Publication date: July 13, 2017
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Hiroaki KOSHIMA, Junichi DESHIMARU, Toshiaki IWAI
  • Patent number: 9593291
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amide-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: March 14, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoko Ogahara, Moritsugu Kasai, Hiroaki Koshima, Masanori Tsujioka, Koji Miyake
  • Patent number: 9074158
    Abstract: Provided is a detergent-dispersant for a lubricant having excellent detergency and dispersibility effects. Specifically provided are: a detergent-dispersant including a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from the group consisting of pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes; and an additive composition for a lubricant and a lubricant composition, each containing the detergent-dispersant.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: July 7, 2015
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Junya Iwasaki, Izumi Terada, Hiroaki Koshima
  • Publication number: 20150080277
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amine-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein, wherein the component (A) contains, based on the total amount of the composition, a zinc primary dialkyldithiophosphate in an amount of from 0.005% by mass to 0.
    Type: Application
    Filed: March 18, 2013
    Publication date: March 19, 2015
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Hiroaki Koshima, Moritsugu Kasai, Yoko Ogahara, Masanori Tsujioka, Koji Miyake
  • Publication number: 20150036962
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amide-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein.
    Type: Application
    Filed: March 18, 2013
    Publication date: February 5, 2015
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoko Ogahara, Moritsugu Kasai, Hiroaki Koshima, Masanori Tsujioka, Koji Miyake
  • Patent number: 8853139
    Abstract: Provided is a detergent-dispersant for a lubricant having excellent detergency and dispersibility effects. Specifically provided are: a detergent-dispersant including a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from the group consisting of pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes; and an additive composition for a lubricant and a lubricant composition, each containing the detergent-dispersant.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 7, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Junya Iwasaki, Izumi Terada, Hiroaki Koshima
  • Publication number: 20140296115
    Abstract: Provided is a detergent-dispersant for a lubricant having excellent detergency and dispersibility effects. Specifically provided are: a detergent-dispersant including a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from the group consisting of pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes; and an additive composition for a lubricant and a lubricant composition, each containing the detergent-dispersant.
    Type: Application
    Filed: June 13, 2014
    Publication date: October 2, 2014
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Junya IWASAKI, Izumi TERADA, Hiroaki KOSHIMA
  • Patent number: 8841242
    Abstract: Provided are an anti-wear agent comprising a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes and/or comprising a reaction product of the heterocyclic compound and a compound selected from a boron compound, a molybdenum compound, and a silicon compound, which is an anti-wear agent for a lubricating oil excellent in wear resistance, friction-reducing property, and base number-retaining property, and a lubricating oil composition comprising the anti-wear agent.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: September 23, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hideki Kamano, Hiroaki Koshima
  • Patent number: 8748358
    Abstract: Provided is an additive for lubricating oils which enhances frictional characteristics of slide parts in internal combustion engines and driving system transmission engines and which exhibit an excellent fuel consumption reducing effect. The above additive for lubricating oils comprises a heterocyclic compound having a heterocyclic skeleton originating in a compound selected from pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, indazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans and thiophenes. A lubricating oil composition containing the above additive for lubricating oils is effectively used for various low friction slide members, antifriction bearings and slide bearings.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: June 10, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hiroaki Koshima, Hideki Kamano
  • Patent number: 8598100
    Abstract: A lubricant additive which comprises a succinimide compound or a boronization product thereof is advantageously used for preparation of a lubricant composition which can maintain the property of anti-shudder for a long time without decreasing the transmission torque capacity or the friction coefficient between metals.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: December 3, 2013
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hiroaki Koshima, Shinichi Yanagi, Keiichi Narita, Hidetoshi Koga
  • Publication number: 20130045904
    Abstract: Provided is a detergent-dispersant for a lubricant having excellent detergency and dispersibility effects. Specifically provided are: a detergent-dispersant including a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from the group consisting of pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes; and an additive composition for a lubricant and a lubricant composition, each containing the detergent-dispersant.
    Type: Application
    Filed: October 19, 2012
    Publication date: February 21, 2013
    Inventors: Junya Iwasaki, Izumi Terada, Hiroaki Koshima
  • Patent number: 8137577
    Abstract: The present invention provides a refrigerator oil composition comprising a base oil which is at least one member selected from mineral oils and synthetic oils, and at least one imide compound, said imide compound in an amount of 0.01 to 5% by mass based on the total amount of the refrigerator oil composition, and also provides a compressor and a refrigeration apparatus using the refrigerator oil composition. The refrigerator oil composition and the compressor and the refrigeration apparatus using the refrigerator oil composition satisfy both sludge dispersibility and prevention of wear and seizing of a sliding part made of aluminum and/or iron.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: March 20, 2012
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Masato Kaneko, Hiroaki Koshima
  • Patent number: 8067345
    Abstract: A refrigerator oil composition includes: a synthetic base oil; and a partial hydrocarbyl ether of an aliphatic polyhydric alcohol condensate, in which the aliphatic polyhydric alcohol condensate includes a condensate of 4 to 20 molecules of a hindered glycol and/or an aliphatic polyhydric alcohol having 3 to 6 hydroxyl groups. The refrigerator oil composition is preferably used in a compression refrigerator that uses a hydrofluorocarbon, a natural refrigerant such as a hydrocarbon, carbon dioxide, or ammonia, a mixed refrigerant of fluoroiodomethane and propene, an unsaturated fluorinated hydrocarbon, a fluorinated ether, a fluorinated alcohol, a fluorinated ketone, or a mixture thereof as a refrigerant, has a low coefficient of friction, and is excellent in energy-saving property.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: November 29, 2011
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Takeo Tokiai, Masato Kaneko, Hiroaki Koshima
  • Publication number: 20110152145
    Abstract: Provided are an anti-wear agent comprising a heterocylclic compound having a heterocyclic skeleton derived from a compound selected from pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes and/or comprising a reaction product of the heterocyclic compound and a compound selected from a boron compound, a molybdenum compound, and a silicon compound, which is an anti-wear agent for a lubricating oil excellent in wear resistance, friction-reducing property, and base number-retaining property, and a lubricating oil composition comprising the anti-wear agent.
    Type: Application
    Filed: June 30, 2008
    Publication date: June 23, 2011
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Hideki Kamano, Hiroaki Koshima
  • Publication number: 20100234254
    Abstract: Provided is an additive for lubricating oils which enhances frictional characteristics of slide parts in internal combustion engines and driving system transmission engines and which exhibit an excellent fuel consumption reducing effect. The above additive for lubricating oils comprises a heterocyclic compound having a heterocyclic skeleton originating in a compound selected from pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, indazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans and thiophenes. A lubricating oil composition containing the above additive for lubricating oils is effectively used for various low friction slide members, antifriction bearings and slide bearings.
    Type: Application
    Filed: March 16, 2007
    Publication date: September 16, 2010
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Hiroaki Koshima, Hideki Kamano
  • Publication number: 20100184982
    Abstract: Provided is a detergent-dispersant for a lubricant having excellent detergency and dispersibility effects. Specifically provided are: a detergent-dispersant including a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from the group consisting of pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes; and an additive composition for a lubricant and a lubricant composition, each containing the detergent-dispersant.
    Type: Application
    Filed: June 10, 2008
    Publication date: July 22, 2010
    Applicant: IDEMITSU KOSAN CO., LTD
    Inventors: Junya Iwasaki, Izumi Terada, Hiroaki Koshima
  • Publication number: 20100029522
    Abstract: A refrigerator oil composition includes: a synthetic base oil; and a partial hydrocarbyl ether of an aliphatic polyhydric alcohol condensate, in which the aliphatic polyhydric alcohol condensate includes a condensate of 4 to 20 molecules of a hindered glycol and/or an aliphatic polyhydric alcohol having 3 to 6 hydroxyl groups. The refrigerator oil composition is preferably used in a compression refrigerator that uses a hydrofluorocarbon, a natural refrigerant such as a hydrocarbon, carbon dioxide, or ammonia, a mixed refrigerant of fluoroiodomethane and propene, an unsaturated fluorinated hydrocarbon, a fluorinated ether, a fluorinated alcohol, a fluorinated ketone, or a mixture thereof as a refrigerant, has a low coefficient of friction, and is excellent in energy-saving property.
    Type: Application
    Filed: November 5, 2007
    Publication date: February 4, 2010
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Takeo Tokiai, Masato Kaneko, Hiroaki Koshima
  • Publication number: 20090277212
    Abstract: The present invention provides a refrigerator oil composition comprising a base oil which is at least one member selected from mineral oils and synthetic oils, and at least one imide compound, said imide compound in an amount of 0.01 to 5% by mass based on the total amount of the refrigerator oil composition, and also provides a compressor and a refrigeration apparatus using the refrigerator oil composition. The refrigerator oil composition and the compressor and the refrigeration apparatus using the refrigerator oil composition satisfy both sludge dispersibility and prevention of wear and seizing of a sliding part made of aluminum and/or iron.
    Type: Application
    Filed: December 14, 2006
    Publication date: November 12, 2009
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Masato Kaneko, Hiroaki Koshima
  • Publication number: 20080161215
    Abstract: An additive for lubricants exhibiting high oxidation stability, high thermal stability, and high Nox resistance, and having excellent functions as an extreme-pressure additive or wear-resistant agent and a lubricant composition containing the additive are provided The present invention provides an additive for lubricants comprising a phosphate ester derivative represented by the general formula [I]: wherein Y represents sulfur (S) or oxygen (O); R1 represents a monovalent organic group having 4 to 24 carbon atoms; R2 represents a divalent organic group having 1 to 6 carbon atoms; and n represents an integer of 1 to 3. The present invention also provides a lubricant composition containing the derivative.
    Type: Application
    Filed: August 25, 2005
    Publication date: July 3, 2008
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Hiroaki Koshima, Shinya Iizuka, Motoharu Ishikawa