Patents by Inventor Daniel F. Caulfield

Daniel F. Caulfield 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).

  • Methods of making composites containing cellulosic pulp fibers
    Patent number: 6730249
    Abstract: Reinforced composites containing cellulosic pulp fibers dispersed in a matrix, wherein the matrix comprises a thermoplastic polymeric material melting above 180° C. and the cellulosic pulp fibers have an alpha-cellulose purity greater than 80% by weight. Methods of making and using the reinforced composites.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: May 4, 2004
    Assignees: The United States of America as represented by the Secretary of Agriculture, Rayonier, Inc.
    Inventors: Karl D. Sears, Rodney E. Jacobson, Daniel F. Caulfield, John Underwood
  • Methods of making composites containing cellulosic pulp fibers
    Publication number: 20020000683
    Abstract: Reinforced composites containing cellulosic pulp fibers dispersed in a matrix, wherein the matrix comprises a thermoplastic polymeric material melting above 180° C. and the cellulosic pulp fibers have an alpha-cellulose purity greater than 80% by weight. Methods of making and using the reinforced composites.
    Type: Application
    Filed: February 15, 2001
    Publication date: January 3, 2002
    Applicant: The United States of America as represented by the Secretary of Agriculture
    Inventors: Karl D. Sears, Rodney E. Jacobson, Daniel F. Caulfield, John Underwood
  • Composites containing cellulosic pulp fibers and methods of making and using the same
    Patent number: 6270883
    Abstract: Reinforced composites containing cellulosic pulp fibers dispersed in a matrix, wherein the matrix comprises a thermoplastic polymeric material melting above 180° C. and the cellulosic pulp fibers have an alpha-cellulose purity greater than 80% by weight. Methods of making and using the reinforced composites.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: August 7, 2001
    Assignees: The United States of America as represented by the Secretary of Agriculture, Rayonier Inc.
    Inventors: Karl D. Sears, Rodney E. Jacobson, Daniel F. Caulfield, John Underwood
  • Method for fiber loading a chemical compound
    Patent number: 5223090
    Abstract: The present invention relates to a method for loading a chemical compound within the fibers of a fibrous material and to the fibrous materials produced by the method. In the method, a fibrous cellulose material is provided which consists of a plurality of elongated fibers having a fiber wall surrounding a hollow interior. The fibrous material has a moisture content such that the level of water ranges from 40-95% of the weight of the fibrous material and the water is positioned substantially within the hollow interior of the fibers and within the fiber walls of the fibers. A chemical is added to the fibrous material in a manner such that the chemical is disposed in the water present in the fibrous material. The fibrous material is then contacted with a gas which is reactive with the chemical to form a water insoluble chemical compound. The method provides a fibrous material having a chemical compound loaded within the hollow interiors and within the fiber walls of the plurality of fibers.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: June 29, 1993
    Assignee: The United States of America as represented by The Secretary of Agriculture
    Inventors: John H. Klungness, Daniel F. Caulfield, Irving B. Sachs, Marguerite S. Sykes, Freya Tan, Richard W. Shilts
  • Method for fiber loading a chemical compound
    Patent number: RE35460
    Abstract: The present invention relates to a method for loading a chemical compound within the fibers of a fibrous material and to the fibrous materials produced by the method. In the method, a fibrous cellulose material is provided which consists of a plurality of elongated fibers having a fiber wall surrounding a hollow interior. The fibrous material has a moisture content such that the level of water ranges from 40-95% of the weight of the fibrous material and the water is positioned substantially within the hollow interior of the fibers and within the fiber walls of the fibers. A chemical is added to the fibrous material in a manner such that the chemical is disposed in the water present in the fibrous material. The fibrous material is then contacted with a gas which is reactive with the chemical to form a water insoluble chemical compound. The method provides a fibrous material having a chemical compound loaded within the hollow interiors and within the fiber walls of the plurality of fibers.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: February 25, 1997
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: John H. Klungness, Daniel F. Caulfield, Irving B. Sachs, Marguerite S. Sykes, Freya Tan, Richard W. Shilts