Patents by Inventor Michael H. Theil

Michael H. Theil 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).

  • Anisotropic cellulose articles, fibers, and films and method of producing same
    Patent number: 4840673
    Abstract: Lyotropic mesophase (liquid crystalline) solutions of cellulose are formed in an ammonia/ammonium thiocyanate solvent. The nature of the solution can be controlled to selectively produce lyotropic cellulose mesophases having either nematic or cholesteric character. High strength, high modulus fibers are produced from a lyotropic mesophase solution of cellulose essentially in the nematic phase. The films are prepared from mesophase solutions of cellulose that are mainly in the cholesteric phase.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: June 20, 1989
    Assignee: North Carolina State University
    Inventors: John A. Cuculo, Michael H. Theil, Kap S. Yang, Yue S. Chen
  • Anisotropic cellulose solutions, fibers, and films formed therefrom
    Patent number: 4750939
    Abstract: Lyotropic mesophase (liquid crystalline) solutions of cellulose are formed in an ammonia/ammonium thiocyanate solvent. The nature of the solution can be controlled to selectively produce lyotropic cellulose mesophases having either nematic or cholesteric character. High strength, high modulus fibers are produced from a lyotropic mesophase solution of cellulose essentially in the nematic phase. The films are prepared from mesophase solutions of cellulose that are mainly in the cholesteric phase.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: June 14, 1988
    Assignee: North Carolina State University
    Inventors: John A. Cuculo, Michael H. Theil, Kap S. Yang, Yue S. Chen