Method for manufacturing a controlled-release device

Details Method for manufacturing a controlled-release device Method for manufacturing a controlled-release device

1997-08-18

1999-09-28

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Dividing work to form plural articles

264255, 264267, 264251, B29C 4514

Patent

active

059583177

ABSTRACT:
A method of manufacturing a controlled-release device is described. The method comprises taking a hollow tubular element which is permeable to the active substance to be released and injecting it with at least two plugs of hardenable material. These plugs form partitions which block the hollow tubular element and are spaced apart to form at least one discrete hollow chamber. The hardenable material is then hardened and an active substance is introduced into at least one of the discrete hollow chambers.

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patent: 3161614 (1964-12-01), Brown et al.
patent: 3479422 (1969-11-01), Zavasnik
patent: 4753719 (1988-06-01), Yamaguchi et al.
patent: 5788977 (1998-08-01), Aguadisch et al.
R. Meals, "Silicones," Encycl. Chem. Techn., 18, J. Wiley (N.Y., 1969).
I.D. Crossan, J. Appl. Polym. Symposium, 32, 421 (1977).

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