Patents by Inventor Louise Renouf

Louise Renouf 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).

  • Marine engine lubrication
    Patent number: 11732210
    Abstract: An additive concentrate package for a marine engine cylinder lubricant is made by mixing an oil of lubricating viscosity, a metal detergent and an oil-soluble alkoxylated alcohol.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: August 22, 2023
    Inventors: Louise Renouf, Stuart A. Taylor, Philip J. Woodward
  • MARINE ENGINE LUBRICATION
    Publication number: 20190169528
    Abstract: An additive concentrate package for a marine engine cylinder lubricant is made by mixing an oil of lubricating viscosity, a metal detergent and an oil-soluble alkoxylated alcohol.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 6, 2019
    Applicant: Infineum International Limited
    Inventors: Louise Renouf, Stuart A. Taylor, Philip J. Woodward
  • Marine engine lubrication
    Patent number: 9534185
    Abstract: Trunk piston marine engine lubrication, when the engine is fueled by heavy fuel oil, is effected by a composition of TBN in the range of 20 to 60 comprising a major amount of an oil of lubricating viscosity containing 50 mass % or more of a Group 1 basestock, and respective minor amounts of a calcium alkyl salicylate detergent system providing 40 to 90 mmol of calcium alkyl salicylate per kg of the composition, and 1 to 7 mass %, based on the mass of the composition, of an oil-soluble polyalkenyl-substituted carboxylic acid anhydride, wherein the or at least one polyalkenyl group is derived from a polyalkene having a number average molecular weight of from 200 to 3,000. Asphaltene precipitation in the lubricant, caused by the presence of contaminant heavy fuel oil, is prevented or inhibited.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: January 3, 2017
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: James C. Dodd, Louise Renouf
  • MARINE ENGINE LUBRICATION
    Publication number: 20130281334
    Abstract: Trunk piston marine engine lubrication, when the engine is fueled by heavy fuel oil, is effected by a composition of TBN in the range of 20 to 60 comprising a major amount of an oil of lubricating viscosity containing 50 mass % or more of a Group 1 basestock, and respective minor amounts of a calcium alkyl salicylate detergent system providing 40 to 90 mmol of calcium alkyl salicylate per kg of the composition, and 1 to 7 mass %, based on the mass of the composition, of an oil-soluble polyalkenyl-substituted carboxylic acid anhydride, wherein the or at least one polyalkenyl group is derived from a polyalkene having a number average molecular weight of from 200 to 3,000. Asphaltene precipitation in the lubricant, caused by the presence of contaminant heavy fuel oil, is prevented or inhibited.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 24, 2013
    Inventors: James C. Dodd, Louise Renouf