Patents by Inventor Warren Stephen Harmon

Warren Stephen Harmon 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).

  • Melt-blown polyarylene sulfide microfibers and method of making the same
    Patent number: 5695869
    Abstract: Melt-blown microfiber webs are prepared from polyarylene sulfide polymers, particularly polyphenylene sulfide. A small amount of a phosphite or phosphonite compound is added to the extruder feedstock. The additive essentially eliminates spurious polymer particle formation at the extruder die openings, even over sustained production periods. The polyarylene sulfide microfiber webs so produced are thus essentially free of spurious particulates, and the web defects which may be caused by such particulates.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: December 9, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: Andrew Bernard Auerbach, Warren Stephen Harmon