Back to results
US 5,958,317 AGranted
Method for manufacturing a controlled-release device
AssigneeDow Corning France S.A.
InventorsLouis Michele Jacques Aguadisch, Andre Rudolf Louis Colas
Life of this patent
Estimating the term…
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.
Claims10
A method for manufacturing a controlled-release device comprising:
- (i) providing a preformed hollow tubular element having a wall, said hollow tubular element being permeable to an active substance,
- (ii) injecting at least two plugs of hardenable material into the preformed tubular element through the wall, said plugs forming partitions within the space defined by the wall of the hollow tubular element and said plugs being spaced apart so as to form one or more chambers,
- (iii) hardening the hardenable materials to form hardened plugs, and
- (iv) introducing the active substance into at least one of the said chambers.
1 more element
Dependencies are inferred from the claim text.