Patents by Inventor Norman C. Sidebotham

Norman C. Sidebotham 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).

  • Patent number: 4137393
    Abstract: Polyester polymer is recovered from polyester fibers (in the form of filaments, yarns or fabrics and the like, both dyed and undyed), and used in the production of new undyed fibers, films, and other polymer products by the process of stripping the dye from the dyed polyester fibers and dissolving the polyester fibers in a solvent in a separate but functionally interrelated (with the dye stripping step) step; separating the dissolved fibers from any undissolved impurities, and thereafter separating the solvent from the polyester without precipitating the polyester by evaporating the solvent.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: January 30, 1979
    Assignee: Monsanto Company
    Inventors: Norman C. Sidebotham, Paul D. Shoemaker, Clarence W. Young, III
  • Patent number: 4118187
    Abstract: Polyester polymer is recovered from mixed collections of fibers in the form of fibers, filaments, yarns, or fabrics (including dyed or undyed fibers other than polyester fibers as well as dyed polyester fibers) and used in the production of new undyed fibers, by solvent stripping the dye from the polyester fibers without dissolving the fibers, and with additional solvent, selectively dissolving the polyester fibers in successive but functionally integrated steps; separating the dissolved fibers from an undissolved impurities and thereafter separating the residual dye-stripping solvent and the additional solvent from the polyester component without precipitiating the polyester component from solution by evaporating the solvent, preferably by atmospheric boiling and vacuum finishing of the molten solution.
    Type: Grant
    Filed: December 9, 1976
    Date of Patent: October 3, 1978
    Assignee: Monsanto Company
    Inventors: Norman C. Sidebotham, Paul D. Shoemaker, Clarence W. Young, III
  • Patent number: 4064079
    Abstract: Polyester fibers are dissolved and solid linear polyester polymer recovered for use in the production of new linear polyester products, particularly polyester fibers or filaments, by the process of dissolving the fibers in a non-depolymerizing dissolution solvent for polyester characterized by inclusion of carbocyclic rings in its structural formula under dissolution conditions for polyester polymer; thereafter quenching the polyester solution; and separating the solid polyester from the solution.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: December 20, 1977
    Assignee: Monsanto Company
    Inventors: Norman C. Sidebotham, Paul D. Shoemaker, Clarence W. Young, III
  • Patent number: 4003880
    Abstract: Polyester polymer is recovered from mixed collections of fibers in the form of fibers, filaments, or fabrics (including dyed or undyed fibers other than polyester fibers as well as dyed polyester fibers) and used in the production of new undyed fibers, films and other polymer products through the process of stripping the dye from the polyester fibers by contacting the fabrics with a dye stripping solvent for polyester polymer which is preferably not a solvent for fibers other than polyester fibers at a temperature below which the polyester fibers dissolve and above which the crystalline lattice of the polyester fibers swell so as to release the dye; then removing essentially all of the dye-containing dye-stripping solvent which is not absorbed by the fibers; then contacting the solvent-laden fibers (which may contain residual dye) with sufficient additional solvent under selective dissolution conditions for polyester fibers; then removing the undissolved fibers and any other undissolved impurities from the so
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: January 18, 1977
    Assignee: Monsanto Company
    Inventors: Norman C. Sidebotham, Paul D. Shoemaker, Clarence W. Young, III
  • Patent number: 4003881
    Abstract: Polyester polymer is recovered from polyester fibers (in the form of filaments, yarns or fabrics and the like, both dyed and undyed), and used in the production of new undyed fibers, films, and other polymer products through the process of: stripping the dye from the dyed polyester fibers by contacting the fibers with a dye-stripping solvent for polyester polymer at a temperature below which the polyester fibers dissolve and above which the crystalline lattice of the polyester fibers swell so as to release the dye; then removing essentially all of the dye-containing dye-stripping solvent which is not absorbed by the fibers and fabrics; then contacting the wet solvent-laden fibers, possibly containing residual dye, with sufficient addition of a dissolution solvent under dissolution conditions for polyester fibers; thereafter precipitating the polyester out of; and, separating the polyester from the solution.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: January 18, 1977
    Assignee: Monsanto Company
    Inventors: Norman C. Sidebotham, Paul D. Shoemaker, Clarence W. Young, III