Patents by Inventor Frederick R. Smith

Frederick R. Smith 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).

  • Alloy rayon fibers of regenerated cellulose and copolymeric acrylic acid salts
    Patent number: 4399255
    Abstract: Alloy rayon fiber of regenerated cellulose and an at least partially neutralized copolymer of acrylic or methacrylic acid and a comonomer selected from an hydroxyalkyl (C.sub.2 -C.sub.6) ester of such acid or a styrenic monomer. The copolymer is present in an amount effective to increase the fluid holding capacity of the fiber. Masses of the fibers are useful as surgical dressings, tampons and other fluid-absorbing articles.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: August 16, 1983
    Assignees: Avtex Fibers Inc., Rohm & Haas Co.
    Inventors: Frederick R. Smith, Walter W. Toy, David Witiak
  • High fluid-holding alloy rayon fiber mass
    Patent number: 4289824
    Abstract: Article of manufacture comprising alloy fibers having high fluid-holding capacity, the alloy fibers being comprised of a matrix of regenerated cellulose having carboxymethylcellulose uniformly dispersed therein, the latter being the sole additive for increasing the fluid holding capacity of the fibers.
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: September 15, 1981
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Fibers of high fluid holding capacity
    Patent number: 4273118
    Abstract: Alloy fibers having high fluid-holding capacity, and a method for making the same, the alloy fibers being comprised of a matrix of regenerated cellulose having 5 to 25 weight percent of alkali metal salts of cellulose sulfate being dispersed therein. The sulfate salts may be present in combination with anionic polymer. The high fluid-holding capacity is at least 4.8 ml per grams as measured by the Demand Absorption Test.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: June 16, 1981
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Alloy rayon
    Patent number: 4199367
    Abstract: Alloy rayon staple fibers containing about 15 to 35% sodium carboxymethylcellulose based on the weight of cellulose ("b.o.c.") and having high fluid holding capacity at least 5.5 cc per gram (such as in the range of up to about 7 cc/g) measured by the Syngyna test.
    Type: Grant
    Filed: April 22, 1977
    Date of Patent: April 22, 1980
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Alloy rayon fibers having dispersed therein an amide polymer and a polyacrylic acid salt
    Patent number: 4179416
    Abstract: Alloy fibers having high fluid-holding capacity, and a method for making the same, the alloy fibers being comprised of a matrix of regenerated cellulose having polyvinylpyrrolidone dispersed therein. The polyvinylpyrrolidone may be present in combination with an anionic polymer.
    Type: Grant
    Filed: February 23, 1978
    Date of Patent: December 18, 1979
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Rayon fibers containing starch
    Patent number: 4144079
    Abstract: Rayon fibers made by spinning a viscose containing dissolved starch. Starch grains may be slurried in water, then made alkaline with NaOH to form a solution and then added to viscose.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: March 13, 1979
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Fibers of high fluid-holding capacity
    Patent number: 4136697
    Abstract: Alloy fibers having high fluid-holding capacity, and a method for making the same, the alloy fibers being comprised of a matrix of regenerated cellulose having polyvinylpyrrolidone dispersed therein. The polyvinylpyrrolidone may be present in combination with an anionic polymer.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: January 30, 1979
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Article and method for making high fluid-holding fiber mass
    Patent number: 4063558
    Abstract: Method for making alloy fibers having high fluid-holding capacity, the alloy fibers being comprised of a matrix of regenerated cellulose having alkali metal salts of alginic acid uniformly dispersed therein.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: December 20, 1977
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Method for making high fluid-holding fiber mass
    Patent number: 4041121
    Abstract: Method for making alloy fibers having high fluid-holding capacity, the alloy fibers being comprised of a matrix of regenerated cellulose having polyvinylpyrrolidone uniformly dispersed therein.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: August 9, 1977
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Fluid absorbent alloy fibers
    Patent number: 3951889
    Abstract: Alloy fibers having high fluid-holding capacity being comprised of a matrix of non-derivatized regenerated cellulose having regenerated cyanoethyl cellulose and polyvinylpyrrolidone uniformly dispersed therein.
    Type: Grant
    Filed: December 6, 1974
    Date of Patent: April 20, 1976
    Assignee: FMC Corporation
    Inventor: Frederick R. Smith
  • Absorbent mass of alloy fibers of regenerated cellulose and polyacrylic acid salt of alkali-metals or ammonium
    Patent number: RE30029
    Abstract: A mass of alloy fibers of polyacrylic acid salt of alkali-metals or ammonium and regenerated cellulose, useful for absorbing fluids, are prepared by mixing a caustic solution of polyacrylic acid with viscose, spinning the mixture into fibers and obtaining dry fibers in the alkaline state. The fibers are advantageously dried with an alkaline lubricating finish thereon and then processed into dressings, sanitary napkins, tampons and diapers.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: June 12, 1979
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith
  • Rayon fibers containing starch
    Patent number: RE31380
    Abstract: Rayon fibers made by spinning a viscose containing dissolved starch. Starch grains may be slurried in water, then made alkaline with NaOH to form a solution and then added to viscose.
    Type: Grant
    Filed: September 23, 1980
    Date of Patent: September 13, 1983
    Assignee: Avtex Fibers Inc.
    Inventor: Frederick R. Smith