Patents by Inventor by Peter R. Payne, administrator

by Peter R. Payne, administrator 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 materials
    Patent number: 4296234
    Abstract: A highly absorbent material, especially suitable for use in absorbent disposable products such as sanitary towels and tampons, consisting of a substantially water-insoluble cross-linked gelatinized starch, in which the degree of substitution of the cross-linking groups is from 0.001 to 0.04, which is substituted by ionic groups which are associated with mono- or di-valent counterions, and which has a urine retention value of at least 6 g/g.
    Type: Grant
    Filed: April 23, 1980
    Date of Patent: October 20, 1981
    Assignee: Lever Brothers Company
    Inventors: Lothar F. O. Mindt, deceased, by Peter R. Payne, administrator, George R. Sanderson