Patents by Inventor Albin Frank Turbak

Albin Frank Turbak 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 producing a regenerated hollow cellulosic fiber
    Patent number: 4086418
    Abstract: Hollow cellulosic fibers are produced by nitrosating and dissolving a cellulosic material in an aprotic solvent selected from the group consisting of a dialkylacylamide and dimethylsulfoxide and regenerating the dissolved cellulose by contacting the cellulose solution with a regenerant. The regenerant is n-octanol where the solvent is a dialkylacylamide and n-hexanol where the solvent is dimethylsulfoxide. The fibers are hollow as regenerated and require no special spinnerette designs nor special spinning conditions.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: April 25, 1978
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Albin Frank Turbak, Richard Benjamin Hammer, Norman A. Portnoy, Arthur C. West
  • Process for producing regenerated cellulosic articles
    Patent number: 4076932
    Abstract: Regenerated cellulosic articles are produced by nitrosating and dissolving cellulose in a dialkylacylamide solvent, such as dimethylformamide, and regenerating the dissolved cellulose by passing into a coagulant bath. The coagulant comprises water or a 1 to 4 carbon atom aliphatic monohydric alcohol and a soluble reactive base, the latter in an amount ranging from 6% to 25% by weight of the regenerant. The process produces regenerated cellulose products of improved resistance to alkaline solubility.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: February 28, 1978
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Richard Benjamin Hammer, Albin Frank Turbak, Norman A. Portnoy, West, Arthur C.
  • Process for producing a regenerated shaped cellulosic fiber
    Patent number: 4076933
    Abstract: Shaped cellulosic fibers are produced by nitrosating and dissolving a cellulosic material in an aprotic solvent selected from the group consisting of a dialkylacylamide and dimethylsulfoxide and regenerating the dissolved cellulose by contacting the cellulose solution with a regenerant. The regenerant is butanol, pentanol or benzyl alcohol where the solvent is a dialkylacylamide and propanol, butanol or benzyl alcohol where the solvent is dimethylsulfoxide. The fibers have a generally crenulated shape as regenerated and require no special spinnerette designs nor special spinning conditions.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: February 28, 1978
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Albin Frank Turbak, Richard Benjamin Hammer, Norman A. Portnoy, Arthur C. West
  • Process for producing regenerated cellulosic fibers
    Patent number: 4056675
    Abstract: Regenerated cellulosic fibers of improved resistance to alkaline treatment are produced by nitrosating and dissolving from 5 to 14% by weight of a cellulosic material in a dialkylacylamide solvent while said solution is maintained at a temperature no greater than 20.degree. C to form a cellulose nitrite ester, and regenerating the cellulose by contacting the cellulose ester with a regenerant. Regeneration of the cellulose occurs before significant oxidation of the cellulose takes place.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: November 1, 1977
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Albin Frank Turbak, Richard Benjamin Hammer