Patents by Inventor Etuo Sumitani

Etuo Sumitani 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).

  • Flame resistant wholly aromatic polyamide fibers
    Patent number: 4196118
    Abstract: A wholly aromatic polyamide fiber which comprises a wholly aromatic polyamide and an organic phosphorus compound having one or more halogen atoms. The wholly aromatic polyamide has repeating units of which at least about 85 mol % are represented by the formula: ##STR1## The amount of the organic phosphorus compound having one or more halogen atoms is such as to provide a halogen atom content of 0.5% to 25.0% and a phosphorus atom content of 0.05% to 6.0% by weight of the wholly aromatic polyamide. The obtained wholly aromatic polyamide fiber has excellent flame-resistance, good color and good fiber properties.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: April 1, 1980
    Assignee: Teijin Limited
    Inventors: Hiroshi Fujie, Osamu Kai, Eiji Masunaga, Etuo Sumitani, Akiro Shimomai