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Intrauterine device for managing the reproductive process

  • US 3,903,880 A
  • Filed: 08/17/1972
  • Issued: 09/09/1975
  • Est. Priority Date: 08/17/1972
  • Status: Expired due to Term
First Claim
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1. IN AN INTRAUTERINE DEVICE FOR CONTROLLING FERTILITY COMPRISING A BODY OF POLYMERIC MATERIAL CONTAINING A PROGESTATIONAL STEROID CAPABLE OF DIFFUSING THROUGH SAID POLYMERIC MATERIAL AT A FERTILITY CONTROLLING RATE, SAID BODY BEING ADAPTED FOR INSERTION AND RETENTION IN THE UTERINE LUMEN, THE IMPROVEMENT WHEREIN SAID INTRAUTERINE POLYMERIC BODY IS COMPRISED OF UTERINE ACCEPTABLE ETHYLENE-VINYL ACETATE COPOLYMER HAVING A VINYL ACETATE CONTENT OF ABOUT 4 TO 80% BY WEIGHT, A MELT INDEZ OF 0.1 TO 1,000 GRAMS PER TEN MINUTES AND PERMABLE TO THE PROGESTATIONAL STEROID WITH THE STEROID DISSOLVING IN AND PASSING THROUGH THE ETHYLENE-VINYL ACATATE COPOLYMER BY DIFFUSION.

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