Patents by Inventor Amy A. Ernst

Amy A. Ernst 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).

  • Topical anesthetic comprising lidocaine, adrenaline, and tetracaine, and its method of use
    Patent number: 5942543
    Abstract: A topical anesthetic includes about 1-10% by weight lidocaine hydrochloride, about 0.01-0.10% by weight adrenaline, and about 0.25-4% by weight tetracaine hydrochloride, preferably in an aqueous base with about 2% benzyl alcohol or in a gel including about 3% hydroxyethyl cellulose. The topical anesthetic has been found to be at least as effective as TAC (tetracaine hydrochloride, adrenaline, cocaine), but with fewer harmful side effects and at a greatly reduced cost (about 1/10 of the cost of TAC).
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: August 24, 1999
    Inventor: Amy A. Ernst
  • Topical anesthetic comprising lidocaine, adrenaline, and tetracaine, and its method of use
    Patent number: 5585398
    Abstract: A topical anesthetic includes about 1-10% by weight lidocaine hydrochloride, about 0.01-0.10% by weight adrenaline, and about 0.25-4% by weight tetracaine hydrochloride, preferably in an aqueous base with about 2% benzyl alcohol or in a gel including about 3% hydroxyethyl cellulose. The topical anesthetic has been found to be at least as effective as TAC (tetracaine hydrochloride, adrenaline, cocaine), but with fewer harmful side effects and at a greatly reduced cost (about 1/10 of the cost of TAC).
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: December 17, 1996
    Inventor: Amy A. Ernst