Patents by Inventor Ashok L. Patel

Ashok L. Patel 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).

  • Hydrophilic polyurethane foams
    Patent number: 5164421
    Abstract: Hydrophilic polyurethane foams containing residues of a polyalkylene glycol monoalkyl or alkaryl ether may be produced by reacting the ether with an isocyanate having a functionality of greater than two and using only stoichiometric amounts or small excesses e.g. up to 12% of weight of water as foaming agent. Methyl, lauryl, cetyl, octylphenyl and nonyl phenyl ethers may be used. The foams are applicable for the manufacture of absorptive devices such as wound dressings, sanitary towels, diapers, incontinence pads or tampons.
    Type: Grant
    Filed: July 3, 1991
    Date of Patent: November 17, 1992
    Assignee: Smith and Nephew Associated Companies plc
    Inventors: Sinan B. Kiamil, Ashok L. Patel