Patents by Inventor Robina M. C. Hogan

Robina M. C. Hogan 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).

  • Manufacture of cellulose ester filaments: lubrication in the spinning cabinet
    Patent number: 7815832
    Abstract: In the manufacture of cellulose ester fibers, a dope is extruded into filaments. Extrusion occurs in an elongated cabinet having an outlet for the filaments. The filaments are taken up after exiting the outlet. The filaments are lubricated at the outlet of the cabinet.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: October 19, 2010
    Assignee: Celanese Acetate, LLC
    Inventors: Heather L. Clarkson, Cheryl F. Corallo, Robina M. C. Hogan, Ramiro Montez Diaz, Ronald Nivins
  • Cellulose acetate tow and method of making same
    Patent number: 6924029
    Abstract: A cigarette filter tow is a cellulose acetate tow having a high uncrimping energy (UCE) and a low fly. In one embodiment, the average UCE is greater than 280 and the average fly is less than or equal to 0.030 grams per 30 minutes. In another embodiment, the average UCE is greater than 265 and the average fly is less than or equal to 0.023 grams per 30 minutes. In another embodiment, the average UCE is greater than 250 and the average fly is less than or equal to 0.017 grams per 30 minutes.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: August 2, 2005
    Assignee: Celanese Acetate, LLC
    Inventors: Philip I. L. Caenen, Cheryl F. Corallo, Gary B. Ellison, Robina M. C. Hogan, David O. Kutscher, William S. Sanderson, Mark E. Scarborough, Donald T. Stilwell