Patents by Inventor Adel El-Kafrawy

Adel El-Kafrawy 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).

  • Process for forming shaped cellulosic product
    Patent number: 4352770
    Abstract: Cellulose is activated by penetration of the cellulose with a polar medium and mixed at a temperature at which no significant degradation occurs with an amide selected from the group consisting of dimethylacetamide, 1-methyl-2-pyrrolidinone and mixtures thereof and from 3 to 15% by weight of lithium chloride. The cellulose is then dissolved in the amide and lithium chloride in the substantial absence of any polar medium other than the amide. Shaped cellulosic products may be formed by reconstituting the cellulose in fiber, sheet or other form.
    Type: Grant
    Filed: May 1, 1981
    Date of Patent: October 5, 1982
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Albin F. Turbak, Adel El-Kafrawy, Fred W. Snyder, Jr., Andrew B. Auerbach
  • Solvent system for cellulose
    Patent number: 4302252
    Abstract: Cellulose is activated by penetration of the cellulose with a polar medium and mixed at a temperature at which no significant degradation occurs with an amide selected from the group consisting of dimethylacetamide, 1-methyl-2-pyrrolidinone and mixtures thereof and from 3 to 15% by weight of lithium chloride. The cellulose is then dissolved in the amide and lithium chloride in the substantial absence of any polar medium other than the amide. Shaped cellulosic products may be formed by reconstituting the cellulose in fiber, sheet or other form.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: November 24, 1981
    Assignee: International Telephone and Telegraph Corp.
    Inventors: Albin F. Turbak, Adel El-Kafrawy, Fred W. Snyder, Jr., Andrew B. Auerbach