Patents by Inventor Yong-Qing Zhang

Yong-Qing Zhang 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).

  • Salt tolerant super absorbents
    Patent number: 5274018
    Abstract: The invention relates to a novel absorbent composition and manner of using the same. The absorbent has at least the following two components:(a) a swellable hydrophobic polymer being capable of absorbing a quantity of water which is at least about 10 times the dry weight of said polymer; and(b) an amount of an ionizable surfactant sufficient to form at least a monolayer of said surfactant about said polymer.The novel absorbent is substantially tolerant to an aqueous solution having a soluble salt, such as sodium chloride.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: December 28, 1993
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Yong-Qing Zhang