Patents by Inventor Castulo Chaban, Jr.

Castulo Chaban, Jr. 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: 4233363
    Abstract: A draw-texturing feed yarn that is new in that it is a heather feed yarn, i.e., is suitable for draw-texturing to form textured yarns that are suitable for making fabrics having a uniform fine heather tone, comprising spin-oriented filaments of two differently-dyeable polyesters. The different component filaments are well mixed to a degree indicated by a new measurement termed DCM (Degree of Component Mixing). The different component filaments preferably have a balanced stress ratio (SR), i.e. the ratio of their stresses at the strain corresponding to the draw ratio undergone during draw-texturing is about 0.8 to about 1.2. Preferred components are homopoly(ethylene terephthalate) and cationic-dyeable copolyester. The heather feed yarns may be prepared by cospinning, with suitable arrangement of spinneret orifices and selection of suitable features, especially polymer viscosities.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: November 11, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert Cemel, Castulo Chaban, Jr., Albert Z. Fresco
  • Patent number: 4229154
    Abstract: A spinneret for the production of hollow filaments that includes a cylindrical shaped insert swaged into each passage of the spinneret to effect a seal between the insert and spinneret. The insert is constructed to contain the polymer entirely within the insert to prevent leakage of polymer into the core gas supply passages of the spinneret.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: October 21, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Castulo Chaban, Jr., Curtis O. Hawkins