Patents by Inventor Charles F. De Long

Charles F. De Long 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).

  • Anti-fouling overcoating composition and use thereof
    Patent number: 4273833
    Abstract: An anti-fouling overcoating composition for watercraft or stationary underwater structures precoated with hard-surface leaching-type anti-fouling paint consists essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic copolymer, a cross-linking agent for the carboxylated hydrophilic copolymer, a polyalkylenepolyamine or a hydrophilic polyalkylenepolyamine derivative and an effective amount of an ultraviolet-absorbing agent.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: June 16, 1981
    Assignee: United States Trading International, Inc.
    Inventor: Charles F. De Long
  • Method of repelling animals and birds
    Patent number: 4169902
    Abstract: A method for repelling animals and birds consists of applying to an area being protected a composition consisting essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic copolymer, a cross-linking agent for the carboxylated hydrophilic copolymer, a stabilizingly effective amount of an ultraviolet-absorbing agent and an animal or bird repelling compound.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: October 2, 1979
    Assignee: United States Trading International, Inc.
    Inventor: Charles F. De Long
  • Method of reducing loss of water by transpiration and composition therefor
    Patent number: 4094845
    Abstract: A method for reducing loss of water from the leaves and stems of plants by transpiration and for protecting plants from damage by wind and cold consists of applying to the leaves and stems a transpiration-decreasing composition consisting essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic polymer and an effective amount of an ultravioletabsorbing agent.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: June 13, 1978
    Assignee: United States Trading International, Inc.
    Inventor: Charles F. De Long
  • Method of reducing fouling of marine structures and coated structure thereof
    Patent number: 4082884
    Abstract: An anti-fouling overcoating composition for watercraft or stationary underwater structures precoated with hard-surface leaching-type anti-fouling paint consists essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic polymer, polyethylenimine or a hydrophilic polyethylenimine derivative and an effective amount of an ultraviolet-absorbing agent.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: April 4, 1978
    Assignee: United States Trading International, Inc.
    Inventor: Charles F. De Long
  • Method for preserving porous inorganic substrates
    Patent number: 4049869
    Abstract: A method for protecting porous inorganic substrates from damage by salt water, gaseous pollutants, graffiti, and erosion consists of applying to the porous inorganic substrate a gas and vapor permeable preservative composition consisting of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic acrylic polymer, and an effective amount of an ultraviolet-absorbing agent.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: September 20, 1977
    Assignee: United States Trading International, Inc.
    Inventor: Charles F. De Long