Patents by Inventor Lawrence J. Cunningham

Lawrence J. Cunningham 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).

  • Fuel compositions and additives therefor
    Patent number: 5514190
    Abstract: A highly effective fuel additive composition for control of intake valve deposits is described. It comprises (a) a gasoline-soluble Mannich reaction product of (i) a high molecular weight alkyl-substituted phenol, (ii) amine, and (iii) aldehyde; (b) a gasoline-soluble poly(oxyalkylene) carbamate; and (c) a gasoline-soluble poly(oxyalkylene) alcohol, glycol or polyol, or mono or diether thereof. Fuel compositions and methods of controlling engine deposits are also described.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: May 7, 1996
    Assignee: Ethyl Corporation
    Inventors: Lawrence J. Cunningham, Thomas L. Zahalka
  • Fuel compositions with enhanced combustion characteristics
    Patent number: 5405417
    Abstract: Fuels, methods of producing fuels, and methods of using fuels to reduce the amount of atmospheric pollutants (NOx, CO, and/or hydrocarbons) formed on combustion of middle distillate fuels in engines or burner apparatus. These results can be achieved without concomitant increases in emissions of particulates. The fuels contain less than 500 ppm of sulfur and at least one peroxy ester combustion improver.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: April 11, 1995
    Assignee: Ethyl Corporation
    Inventor: Lawrence J. Cunningham
  • Enhanced hydrocarbonaceous additive concentrate
    Patent number: 5385588
    Abstract: This invention relates to a method for enhancing an additive concentrate package so as to improve its shelf-life stability comprising forming an additive concentrate containing (i) a major amount of detergent/dispersant and (ii) a minor amount of demulsifier; and admixing a solvent stabilizer composition with said additive concentrate in an amount sufficient to improve the shelf-life stability of the additive concentrate package.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: January 31, 1995
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventors: Timothy J. Brennan, Lawrence J. Cunningham
  • Enhanced fuel additive concentrate
    Patent number: 5279626
    Abstract: This invention relates to a method for enhancing a fuel additive package so as to improve the shelf-life of the package comprising forming a fuel additive package containing (i) a major amount of detergent/dispersant and (ii) a minor amount of demulsifier; and admixing a solvent stabilizer composition with said additive package in an amount sufficient to improve the shelf-life of the fuel additive package.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: January 18, 1994
    Assignee: Ethyl Petroleum Additives Inc.
    Inventors: Lawrence J. Cunningham, Tim Brennan
  • Middle distillate fuels and additives therefor
    Patent number: 5215547
    Abstract: This invention relates to novel hexahydrotriazine compounds, a process for their production and their use as additives for fuels and oleaginous fluids.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: June 1, 1993
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventors: John G. Bostick, Lawrence J. Cunningham
  • Middle distillate fuels and additives therefor
    Patent number: 5162049
    Abstract: This invention relates to stabilizer additives for hydrocarbonaceous fuels comprising at least one or a mixture of hexahydrotriazine compounds and at least one or a mixture of imine compounds.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: November 10, 1992
    Assignee: Ethyl Petroleum Additives
    Inventors: John G. Bostick, Lawrence J. Cunningham
  • Hexahydropyrimidine derivatives
    Patent number: 5106975
    Abstract: When a phenol having substituents in at least the 2- and 4-positions but having a hydrogen atom in the 6-position, or a phenol having substituents in at least the 2- and 6-positions but having a hydrogen atom in the 4-position is reacted with formaldehyde and 1,3-propanediamine, a unique insertion-condensation reaction occurs whereby the product is a hexahydropyrimidine derivative which may be represented by the general formula ##STR1## wherein R.sub.1 is (i) a 2-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (ii) a 4-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions; and R.sub.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: April 21, 1992
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventors: Dennis J. Malfer, John G. Bostick, Lawrence J. Cunningham, J. Vincent Hanlon
  • Cold flow improver and method of use thereof
    Patent number: 4708993
    Abstract: Oligomers of polymerizable ester-containing halopolyalkylenes are effective as cold flow improvers in middle distillate fuels.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: November 24, 1987
    Assignee: Petrolite Corporation
    Inventors: Michael I. Naiman, John A. Schield, Lawrence J. Cunningham