Patents by Inventor Eleanor C. Hawkins

Eleanor C. Hawkins 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).

  • Method of preparing salts of carboxymethylcellulose
    Patent number: 4689408
    Abstract: Disclosed are novel sodium salt of carboxymethylcellulose (CMC) which are substantially nonfibrous, have a degree of substitution (D.S.) of 0.2 to 0.9 and an absorbency of at least 25 g. liquid/g. the novel CMC material, and are prepared from a cellulose furnish having a degree of polymerization (D.P.) of greater than 1,000; and to processes for preparing same. Owing to their high absorbency properties, they are particularly useful in the manufacture of disposable nonwoven products, such as adult incontinence pads, feminine hygiene products, disposable diapers and surgical dressings.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: August 25, 1987
    Assignee: Hercules Incorporated
    Inventors: Robert A. Gelman, Eleanor C. Hawkins