Patents Represented by Attorney, Agent or Law Firm Josetta Jones
  • Lubricating oil having enhanced resistance to oxidation, nitration and viscosity increase
    Patent number: 6756348
    Abstract: This invention is directed to an antioxidant system for use in lubricating oils comprising sulfurized isobutylene and hindered phenols that provides enhanced oxidation resistance and is particularly useful in natural gas fueled engines, the method for making this antioxidant system, lubricating oils comprising the antioxidant system and methods for lubricating engines using lubricating oil comprising this antioxidant system.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: June 29, 2004
    Assignee: Chevron Oronite Company LLC
    Inventors: John D. Palazzotto, Mark R. Logan
  • Lubricating oil additive system particularly useful for natural gas fueled engines
    Patent number: 6642191
    Abstract: A lubricating oil comprising a major amount of at least one of Group II, III, and IV base oil and a minor amount of 3,5-di-t-butyl 4-hydroxy phenol propionate. A method of making this lubricating oil and a method of lubricating a natural gas engine with this lubricating oil.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: November 4, 2003
    Assignee: Chevron Oronite Company LLC
    Inventors: John D. Palazzotto, Mark R. Logan