Patents by Inventor Robert P. Coyle

Robert P. Coyle 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).

  • Process for the manufacture of fire retardant particleboard
    Patent number: 4039645
    Abstract: A process for manufacturing a unique fire retardant particleboard includes the supersaturation of wood chips, followed by spraying of the wood chips with an aqueous solution of borate and sulfuric acid, after which the sprayed wood chips are allowed to stand for a period of time to become impregnated and saturated with the aqueous solution. The impregnated wood chips are then allowed to dry, after which a urea formaldehyde adhesive is applied to the wood chips, and the chips are consolidated to form the fire resistant wood particleboard.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: August 2, 1977
    Assignee: Champion International Corporation
    Inventor: Robert P. Coyle
  • Particleboard, hardboard, and plywood produced in combination with a lignin sulfonate-phenol formaldehyde glue system
    Patent number: 3931072
    Abstract: Improved lignocellulosic particleboard, hardboard, and plywood are produced using a lignin sulfonate-phenol formaldehyde glue system. Preferred products are secured by using Douglas fir chips in combination with a unique technique of blending the lignin sulfonate with a phenol and formaldehyde. A specific technique is to react lignin sulfonate with formaldehyde under influence of caustic and heat and then to react the resulting compound with phenol formaldehyde resin to secure a more effective final glue system.
    Type: Grant
    Filed: August 24, 1972
    Date of Patent: January 6, 1976
    Assignee: Champion International Corporation
    Inventor: Robert P. Coyle