Patents by Inventor Carl Brent Smith

Carl Brent Smith 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: 7201778
    Abstract: A process for producing an ionic crosslinked fibrous material, such as a cellulosic fabric, paper, or other substrate, wherein the ionic crosslinked fiber exhibits an increased wrinkle resistance angle. A process for producing a cationized chitosan, wherein the cationized chitosan exhibits cationization at the C6 and ring hydroxyl sites and the reactivity of the ring NH2 sites is preserved. A process for applying a polycation to an anionic fibrous material to form an ionic crosslinked fibrous material. A process for producing a cationized fibrous material, wherein the process is performed as a pad-batch process, an exhaust fixation process, a pad-steam process, or a pad-dry-cure process.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: April 10, 2007
    Assignee: North Carolina State University
    Inventors: Carl Brent Smith, Mustafa Bilgen, Peter J. Hauser
  • Patent number: 7166135
    Abstract: A process for producing an ionic crosslinked fibrous material, such as a cellulosic fabric, paper, or other substrate, wherein the ionic crosslinked fiber exhibits an increased wrinkle resistance angle. A process for producing a cationized chitosan, wherein the cationized chitosan exhibits cationization at the C6 and ring hydroxyl sites and the reactivity of the ring NH2 sites is preserved. A process for applying a polycation to an anionic fibrous material to form an ionic crosslinked fibrous material. A process for producing a cationized fibrous material, wherein the process is performed as a pad-batch process, an exhaust fixation process, a pad-steam process, or a pad-dry-cure process.
    Type: Grant
    Filed: January 13, 2004
    Date of Patent: January 23, 2007
    Assignee: North Carolina State University
    Inventors: Carl Brent Smith, Mohamed Mahmoud Hashem, Peter J. Hauser
  • Publication number: 20040158935
    Abstract: A process for producing an ionic crosslinked fibrous material, such as a cellulosic fabric, paper, or other substrate, wherein the ionic crosslinked fiber exhibits an increased wrinkle resistance angle. A process for producing a cationized chitosan, wherein the cationized chitosan exhibits cationization at the C6 and ring hydroxyl sites and the reactivity of the ring NH2 sites is preserved. A process for applying a polycation to an anionic fibrous material to form an ionic crosslinked fibrous material. A process for producing a cationized fibrous material, wherein the process is performed as a pad-batch process, an exhaust fixation process, a pad-steam process, or a pad-dry-cure process.
    Type: Application
    Filed: January 13, 2004
    Publication date: August 19, 2004
    Applicant: North Carolina State University
    Inventors: Carl Brent Smith, Mohamed Mahmoud Hashem, Peter J. Hauser
  • Patent number: 6676710
    Abstract: A process for treating a textile substrate, the process including the steps of providing a textile substrate; providing a treatment bath; entraining a transport material in the treatment bath wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath; and contacting the textile substrate with the transport material in the treatment bath to thereby treat the textile substrate with the treatment material in the transport material.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: January 13, 2004
    Assignee: North Carolina State University
    Inventors: Carl Brent Smith, Walter A. Hendrix, Donald L. Butcher
  • Publication number: 20020108183
    Abstract: A process for treating a textile substrate, the process including the steps of providing a textile substrate; providing a treatment bath; entraining a transport material in the treatment bath wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath; and contacting the textile substrate with the transport material in the treatment bath to thereby treat the textile substrate with the treatment material in the transport material.
    Type: Application
    Filed: December 4, 2000
    Publication date: August 15, 2002
    Inventors: Carl Brent Smith, Walter A. Hendrix, Donald L. Butcher
  • Patent number: 6048369
    Abstract: Processes for dyeing a hydrophobic textile fiber with a colorant material using a SCF--CO.sub.2 dyebath are described. One process employs cooling, without venting or removing CO.sub.2 from the system, to a target CO.sub.2 temperature at or below the glass transition temperature of the hydrophobic fiber, followed by the venting of the dyeing system to atmospheric pressure. The other process employs venting, without cooling, to a target CO.sub.2 density where dye is no longer soluble in the SCF--CO.sub.2, followed by cooling to a target temperature and then venting to atmospheric pressure. Optionally, the temperature of the dyeing process is established by heating the process according to a selected temperature profile.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: April 11, 2000
    Assignee: North Carolina State University
    Inventors: Carl Brent Smith, Gerardo A. Montero, Walter A. Hendrix