Patents by Inventor Ramnath Iyer

Ramnath Iyer 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: 11479735
    Abstract: A lubricating and cooling fluid for an electric motor system including a lubricating base oil, at least one sulfurized component, a dispersant system comprising at least two dispersants, and a friction modifier system comprising at least two friction modifiers. The lubricating and cooling fluid provides good wear and friction performance as well as good copper corrosion and electrical conductivity for use in electric motor system.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: October 25, 2022
    Assignees: Afton Chemical GMBH, Mercedes-Benz Group AG
    Inventors: Ramnath Iyer, Christian Windel, Jörg Meyer-Berge
  • Publication number: 20220298449
    Abstract: A lubricating and cooling fluid for an electric motor system including a lubricating base oil, at least one sulfurized component, a dispersant system comprising at least two dispersants, and a friction modifier system comprising at least two friction modifiers. The lubricating and cooling fluid provides good wear and friction performance as well as good copper corrosion and electrical conductivity for use in electric motor system.
    Type: Application
    Filed: March 19, 2021
    Publication date: September 22, 2022
    Applicant: Daimler AG
    Inventors: Ramnath Iyer, Christian Windel, Jörg Meyer-Berge
  • Publication number: 20080009426
    Abstract: A lubricant composition may comprise at least one phosphorus- and boron-containing dispersant, at least one boron-containing dispersant, and at least one detergent. Such composition may be useful in power transmissions to provide improved anti-shudder performance and/or improved friction durability.
    Type: Application
    Filed: August 15, 2007
    Publication date: January 10, 2008
    Inventors: Ramnath Iyer, Samuel Tersigni
  • Publication number: 20070111906
    Abstract: A relatively low viscosity transmission fluid composition, transmissions containing the fluids, and methods of operating motor vehicles with the fluids are described. The transmission fluid composition includes a lubricant basestock, at least one active sulfur-containing component, and at least one phosphorus-containing compound. An active sulfur atom content of the composition is greater than about 0.02 wt. %, and a ratio of active sulfur atoms to phosphorus atoms in the composition is above about 5. The composition has a viscosity at 100° C. ranging from about 4 to less than about 7 centistokes.
    Type: Application
    Filed: November 12, 2005
    Publication date: May 17, 2007
    Inventors: Jeffrey Milner, Ramnath Iyer, Samuel Tersigni
  • Publication number: 20070066498
    Abstract: An additive composition and a power transmitting fluid including the additive composition having the following components: a dispersant, an antioxidant, an anti-foam agent, and a dihydrocarbyl hydrogen phosphite. Power transmitting fluids may be formulated to have enhanced wear protection performance and enhanced anti-shudder durability by including additive compositions including the forgoing components.
    Type: Application
    Filed: October 19, 2006
    Publication date: March 22, 2007
    Inventors: Nubar Ozbalik, Ramnath Iyer, Samuel Tersigni
  • Publication number: 20070042916
    Abstract: Advanced methods are provided for achieving improved power transmission performance, and unique fluid compositions useful for practicing such methods are also presented. In particular a method and related composition is provided for reducing NVH in a power transmission apparatus having a friction torque transfer apparatus, such as, e.g., a shifting clutch, comprising maintaining a negative ??/?T slope, and/or a negative ??/?P slope, during engagement of the friction torque transfer apparatus.
    Type: Application
    Filed: June 22, 2006
    Publication date: February 22, 2007
    Inventors: Ramnath Iyer, Timothy Cameron, Samuel Tersigni, Harald Maelger, Tze-Chi Jao
  • Publication number: 20070000745
    Abstract: Advanced methods are provided for achieving improved power transmission performance, and unique fluid compositions useful for practicing such methods are also presented. In particular a method is provided for reducing NVH in a power transmission apparatus having a friction torque transfer apparatus, such as, e.g., a shifting clutch, comprising maintaining a negative ??/?T slope, and/or a negative ??/?P slope, during engagement of the friction torque transfer apparatus.
    Type: Application
    Filed: June 22, 2006
    Publication date: January 4, 2007
    Inventors: Timothy Cameron, Ramnath Iyer, Tze-Chi Jao
  • Publication number: 20070004603
    Abstract: Advanced methods are provided for achieving improved power transmission performance, and unique fluid compositions useful for practicing such methods are also presented. In particular a method and related composition is provided for improving anti-NVH durability in aged transmission fluids.
    Type: Application
    Filed: June 22, 2006
    Publication date: January 4, 2007
    Inventors: Ramnath Iyer, Samuel Tersigni, Tze-Chi Jao
  • Publication number: 20060264340
    Abstract: An additive composition and lubricating fluid are disclosed that provide high steel-on-paper friction durability, good metal-metal extreme pressure performance characteristics and synchronizer performance. The lubricating fluid includes a base oil, a succinimide dispersant, a succinimide friction modifier, and a phosphonate. Also disclosed is a method for lubricating a dual clutch transmission employing a plurality of wet clutches, with the lubricating fluid of the disclosure.
    Type: Application
    Filed: May 20, 2005
    Publication date: November 23, 2006
    Inventors: Ramnath Iyer, Samuel Tersigni, Jeffrey Milner
  • Publication number: 20050192186
    Abstract: Compositions and methods are disclosed for providing anti-shudder performance in power transmission fluids through the incorporation of a non-dispersant viscosity index improver. Further, the disclosed compositions achieve improved compatibility of an elastomeric component with a lubricating fluid through the incorporation of a non-dispersant viscosity index improver.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 1, 2005
    Inventors: Ramnath Iyer, Samuel Tersigni
  • Publication number: 20050124508
    Abstract: The present invention discloses compositions and methods for improving steel-on-steel friction in power transmission fluids through the use of a sufficient amount of a thiadiazole or derivatives thereof.
    Type: Application
    Filed: December 4, 2003
    Publication date: June 9, 2005
    Inventors: Ramnath Iyer, Samuel Tersigni
  • Publication number: 20050101494
    Abstract: An additive composition may comprise at least one phosphorus- and boron-containing dispersant, at least one boron-containing dispersant, and at least one detergent. Such composition may be useful in power transmissions to provide improved anti-shudder performance and/or improved friction durability.
    Type: Application
    Filed: November 10, 2003
    Publication date: May 12, 2005
    Inventors: Ramnath Iyer, Samuel Tersigni
  • Publication number: 20050059561
    Abstract: An additive composition and a power transmitting fluid including the additive composition having the following components: a dispersant, an antioxidant, an anti-foam agent, and a dihydrocarbyl hydrogen phosphite. Power transmitting fluids may be formulated to have enhanced wear protection performance and enhanced anti-shudder durability by including additive compositions including the forgoing components.
    Type: Application
    Filed: September 17, 2003
    Publication date: March 17, 2005
    Inventors: Nubar Ozbalik, Ramnath Iyer, Samuel Tersigni