Patents by Inventor Ronald N. Duvall

Ronald N. Duvall 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).

  • Effervescent analgesic antacid composition having reduced sodium content
    Patent number: 4942039
    Abstract: An effervescent analgesic antacid composition having reduced sodium content is produced from a mixture of an analgesic, such as acetylsalicylic acid, acetaminophen, ketoprofen or a mixture thereof, citric acid, sodium bicarbonate, calcium carbonate, potassium bicarbonate, and minor amounts of flavors and sweeteners.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: July 17, 1990
    Assignee: Miles Inc.
    Inventors: Ronald N. Duvall, Gerald Gold