Patents by Inventor Bradford C. Webb

Bradford C. Webb 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).

  • Synthetic viscoelastic material for ophthalmic applications
    Patent number: 5422376
    Abstract: A viscoelastic composition for injection into a human eye comprised of about 2.0 to 2.5 percent of hydroxypropyl methylcellulose dissolved in a physiological salt solution, the composition, the composition having a viscosity from about 15,000 to about 40,000 centipoise and the hydroxypropyl methylcellulose having a molecular weight from about 220,000 to less than about 420,000 Daltons, the composition being free of debris or gels greater than 0.5 .mu.m. Also described is a process for preparing the clean, high molecular weight hydroxy propylmethyl cellulose composition.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: June 6, 1995
    Inventor: Bradford C. Webb
  • Synthetic viscoelastic material for ophthalmic applications
    Patent number: RE42243
    Abstract: A viscoelastic composition for injection into a human eye comprised of about 2.0 to 2.5 percent of hydroxypropyl methylcellulose dissolved in a physiological salt solution, the composition, the composition having a viscosity from about 15,000 to about 40,000 centipoise and the hydroxypropyl methylcellulose having a molecular weight from about 220,000 to less than about 420,000 Daltons, the composition being free of debris or gels greater than 0.5 ?m. Also described is a process for preparing the clean, high molecular weight hydroxy propylmethyl cellulose composition.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: March 22, 2011
    Assignee: Alcon, Inc.
    Inventor: Bradford C. Webb