Patents by Inventor Nelson D. Burkholder, Jr.

Nelson D. Burkholder, Jr. 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).

  • Absorbent articles and methods for their preparation
    Patent number: 4154898
    Abstract: Water swellable absorbent articles, made from solutions of carboxylic polyelectrolytes, together with methods for their preparation, and a composition useful to make said articles are disclosed. The articles are cured and/or crosslinked with polyamide-polyamine epichlorohydrin adducts by heating and/or removing substantially all of the solvent from the precursor composition.The absorbent articles are useful as surgical sponges, diapers, tampons, meat trays, bath mats and the like.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: May 15, 1979
    Assignee: The Dow Chemical Company
    Inventor: Nelson D. Burkholder, Jr.
  • Absorbent articles and methods for their preparation
    Patent number: 4076673
    Abstract: Water swellable absorbent articles, made from solutions of carboxylic polyelectrolytes, together with methods for their preparation, and a composition useful to make said articles are disclosed. The articles are cured and/or crosslinked with polyamide-polyamine epichlorohydrin adducts by heating and/or removing subsantially all of the solvent from the precursor composition.The absorbent articles are useful as surgical sponges, diapers, tampons, meat trays, bath mats and the like.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: February 28, 1978
    Assignee: The Dow Chemical Company
    Inventor: Nelson D. Burkholder, Jr.
  • Preparation of water-absorbent articles
    Patent number: 3959569
    Abstract: Water-absorbent articles are prepared by contacting a fibrous material with a dry granular or powdered water-swellable gel and steaming the mixture. Adherence of the gel is improved by pretreatment of the fibrous base with a cationic polymer such as polyethylenimine. Fabrics or fluffs coated with particulate gels such as crosslinked partially hydrolyzed polyacrylamide are useful in various applications where it is desirable to hold or absorb an aqueous fluid in a particular location.
    Type: Grant
    Filed: August 2, 1974
    Date of Patent: May 25, 1976
    Assignee: The Dow Chemical Company
    Inventor: Nelson D. Burkholder, Jr.