3898986 is referenced by 13 patents and cites 8 patents.

An improved intrauterine device which delivers a predetermined therapeutically effective dosage of drug locally to the uterus over a defined period of time is disclosed. The device is initially of a uterine-retentive shape. The device is characterized by undergoing a structural biotransformation in the uterus such that at the completion of the defined period of drug delivery it has achieved a non-uterine-retentive configuration.

Title
Biotransformable intrauterine device
Application Number
05/319,014
Publication Number
3898986
Application Date
December 27, 1972
Publication Date
August 12, 1975
Inventor
Zaffaroni Alejandro
Agent
Benz William H
Mandell Edward L
Sabatine Paul L
Assignee
Alza Corporation
IPC
A61m 31/00
A61f 05/46
A61F 06/14
A61F 06/00
A61K 09/00
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