Patents by Inventor John V. Stoffa

John V. Stoffa 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).

  • Borated overbased sulfonates for improved gear performance in functional fluids
    Patent number: 5635459
    Abstract: A functional fluid composition having improved gear performance comprises an oil of lubricating viscosity, and added thereto(a) an alkali or alkaline earth metal salt complex in the form of borated and/or non-borated salts;(b) an EP/antiwear agent comprising a mixture of zinc salts of dialkylphosphorodithioic acid and 2-ethylhexanoic acid heated with triphenyl phosphite or an olefin; and(c) a borated epoxide.The oil of lubricating viscosity has a kinematic viscosity of at least 4 cSt and 100.degree. C. and a -40.degree. C. Brookfield viscosity of less than 20,000.
    Type: Grant
    Filed: October 27, 1995
    Date of Patent: June 3, 1997
    Assignee: The Lubrizol Corporation
    Inventors: John V. Stoffa, Richard E. Gapinski
  • Functional fluid with triglycerides, detergent-inhibitor additives and viscosity modifying additives
    Patent number: 5427700
    Abstract: A functional fluid is disclosed which comprises(A) at least one triglyceride;(B) at least one detergent-inhibitor additive; and(C) at least one viscosity modifying additive and further comprising (D) at least one synthetic oil.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: June 27, 1995
    Assignee: The Lubrizol Corporation
    Inventor: John V. Stoffa
  • Functional fluid with triglycerides, detergent-inhibitor additives and viscosity modifying additives
    Patent number: 5298177
    Abstract: A functional fluid is disclosed which comprises(A) at least one triglyceride;(B) at least one detergent-inhibitor additive; and(C) at least one viscosity modifying additive and further comprising (D) at least one synthetic oil.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: March 29, 1994
    Assignee: The Lubrizol Corporation
    Inventor: John V. Stoffa
  • Functional fluid with borated epoxides, carboxylic solubilizers, zinc salts, calcium complexes and sulfurized compositions
    Patent number: 5284591
    Abstract: A multipurpose functional fluid is disclosed which is comprised of a major amount of a hydrocarbon oil and a minor amount, sufficient to improve characteristics of the fluid of a novel additive. The additive is comprised of a calcium salt complex, a group II metal dithiophosphate salt, a borated epoxide, a carboxylic solubilizer and a sulfurized composition.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: February 8, 1994
    Assignee: The Lubrizol Corporation
    Inventors: Frederick L. Bayles, Jr., Reed H. Walsh, Craig D. Tipton, John V. Stoffa