Patents Assigned to G&W Laboratories, Inc.
  • Contraceptive suppository
    Patent number: 4187286
    Abstract: A suppository especially adapted for vaginal insertion to act as a contraceptive which comprises a mixture of polyethylene glycol, a spermicidally-active ingredient, a thickening agent, an effervescent agent and alginic acid, the action of the alginic acid reacting with the effervescent agent in moist conditions to form carbon dioxide and also forming a viscous barrier adherent to the vaginal walls to prevent penetration of the sperm.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: February 5, 1980
    Assignee: G&W Laboratories, Inc.
    Inventor: Bertram J. Marcus