Patents by Inventor William P. Tew

William P. Tew 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).

  • Stable solution of hyaluronate in a balanced salt medium
    Patent number: 6271216
    Abstract: A stable physiologic balanced salt solution of a hyaluronate salt, such as sodium hyaluronate, is provided which contains calcium ion, for example, in the form of calcium chloride or calcium acetate, and magnesium ion, for example in the form of magnesium chloride or magnesium acetate, together with sodium chloride, potassium chloride or potassium acetate, sodium acetate, sodium citrate and water, and optionally bicarbonate, dextrose and glutathione disulfide, preservatives and other conventional ingredients employed in irrigating solutions. This solution is used as a visco-elastic ophthalmic device during ophthalmic surgery.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: August 7, 2001
    Assignee: Allergan
    Inventors: Robert J. Mello, William P. Tew, Narlin B. Beaty