Patents by Inventor Steven William Doane

Steven William Doane 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).

  • Patent number: 8017553
    Abstract: Superabsorbent polymer (SAP) products for use in agricultural applications, and methods of making and using the same are disclosed. Certain of the SAPs include a monomer or a mixture of monomers, selected from acrylic acid, acrylamide, acrylonitrile, methacrylamide, 2-acryloamido-2-methyl-propanesulfonic acid, methacrylic acid, vinyl sulfonic acid, ethyl acrylate, potassium acrylate, derivatives thereof or mixtures thereof, that is graft polymerized onto a starch in the presence of an initiator to form a starch graft copolymer.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: September 13, 2011
    Assignee: Absorbent Technologies, Inc.
    Inventors: William McKee Doane, Steven William Doane, Milan H. Savich
  • Publication number: 20090069185
    Abstract: Superabsorbent polymer (SAP) products for use in agricultural applications, and methods of making and using the same are disclosed. Certain of the SAPs include a monomer or a mixture of monomers, other than acrylonitrile, that is graft polymerized onto a starch in the presence of an initiator to form a starch graft copolymer that is cross-linked and the SAP product is isolated.
    Type: Application
    Filed: November 4, 2008
    Publication date: March 12, 2009
    Applicant: Absorbent Technologies, Inc.
    Inventors: William McKee Doane, Steven William Doane, Milan H. Savich
  • Patent number: 7459501
    Abstract: Superabsorbent polymer (SAP) products for use in agricultural applications, and methods of making and using the same are disclosed. Certain of the SAPs include a monomer or a mixture of monomers, other than acrylonitrile, that is graft polymerized onto a starch in the presence of an initiator to form a starch graft copolymer that is cross-linked and the SAP product is isolated.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: December 2, 2008
    Assignee: Absorbent Technologies, Inc.
    Inventors: William McKee Doane, Steven William Doane, Milan H. Savich
  • Patent number: 7425595
    Abstract: A superabsorbent polymer combined with a beneficial additive and method for administering the same in agricultural applications is disclosed. A method for delivering a beneficial additive in agricultural applications includes obtaining a beneficial additive combined with a superabsorbent starch graft copolymer and dispensing the combined beneficial additive and superabsorbent polymer in an agricultural environment.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: September 16, 2008
    Assignee: Absorbent Technologies, Inc.
    Inventors: Milan H. Savich, Gary S. Olson, Eddie W. Clark, William McKee Doane, Steven William Doane
  • Patent number: 7423106
    Abstract: A superabsorbent starch graft copolymer product having particle sizes useful in granule applicators for application to agricultural fields. Starch graft copolymers applied to field crops provide excellent anti-crusting properties, increased seed germination and stand, increased crop growth, increased yields, and reduced water requirements.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: September 9, 2008
    Assignee: Absorbent Technologies, Inc.
    Inventors: Steven William Doane, William McKee Doane
  • Patent number: 7423090
    Abstract: A method of and a product formed by entrapping a bioactive, growth-promoting additive in a starch matrix to form a starch-based, superabsorbent polymer product for use in agricultural applications involves (1) graft polymerizing a monomer and a starch to form a starch graft copolymer including a starch matrix; (2) isolating the starch graft copolymer; (3) forming particles of starch graft copolymer; and (4) adding a bioactive, growth-promoting additive such that at least some of the bioactive, growth-promoting additive is entrapped by the starch matrix. Following placement of the starch-based SAP including a bioactive, growth-promoting additive in proximity to a plant, root, seed, or seedling, growth of the plant, root, seed, or seedling is promoted because availability of beneficial nutrients is increased.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: September 9, 2008
    Assignee: Absorbent Technologies, Inc.
    Inventors: William McKee Doane, Steven William Doane, Milan H. Savich
  • Patent number: 7009020
    Abstract: Methods of making and using a superabsorbent starch graft copolymer involve producing starch graft copolymers having particle sizes useful in granule applicators for application to agricultural fields. Starch graft copolymers applied to field crops provide excellent anti-crusting properties, increased seed germination and stand, increased crop growth, increased yields, and reduced water requirements.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: March 7, 2006
    Inventors: Steven William Doane, William McKee Doane
  • Patent number: 6800712
    Abstract: Methods of making and using starch graft copolymers produce particle sizes useful in granule applicators for applying to agricultural fields. Starch graft copolymers on field crops provide excellent anti-crusting properties, increased seed germination and stand, increased crop growth, increased crop yields and reduced water requirements.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: October 5, 2004
    Inventors: Steven William Doane, William McKee Doane
  • Publication number: 20040152833
    Abstract: Methods of making and using a superabsorbent starch graft copolymer involve producing starch graft copolymers having particle sizes useful in granule applicators for application to agricultural fields. Starch graft copolymers applied to field crops provide excellent anti-crusting properties, increased seed germination and stand, increased crop growth, increased yields, and reduced water requirements.
    Type: Application
    Filed: January 21, 2004
    Publication date: August 5, 2004
    Inventors: Steven William Doane, William McKee Doane
  • Publication number: 20040148854
    Abstract: Methods of making and using a superabsorbent starch graft copolymer involve producing starch graft copolymers having particle sizes useful in granule applicators for application to agricultural fields. Starch graft copolymers applied to field crops provide excellent anti-crusting properties, increased seed germination and stand, increased crop growth, increased yields, and reduced water requirements.
    Type: Application
    Filed: January 21, 2004
    Publication date: August 5, 2004
    Inventors: Steven William Doane, William McKee Doane
  • Publication number: 20040068073
    Abstract: Methods of making and using starch graft copolymers produce particle sizes useful in granule applicators for applying to agricultural fields. Starch graft copolymers on field crops provide excellent anti-crusting properties, increased seed germination and stand, increased crop growth, increased crop yields and reduced water requirements.
    Type: Application
    Filed: October 7, 2002
    Publication date: April 8, 2004
    Inventors: Steven William Doane, William McKee Doane