Controlled release device
First Claim
Patent Images
1. A controlled release device, which comprises:
- (i) a hydrogel; and
incorporated therewith(ii) an active substance which is releasedthrough the hydrogel, with at least part of at least one surface of the device comprising(iii) a layer which is impermeable to aqueous media and to said active substance thereby providing control of release of active substance from said device to the extent that at least functionally effective amounts of said active substance are released.
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Abstract
A controlled release device which comprises:
(i) a hydrogel; and incorporated therewith
(ii) an active substance,
at least part of at least one surface of the device comprising
(iii) a layer which is impermeable to aqueous media.
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Citations
20 Claims
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1. A controlled release device, which comprises:
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(i) a hydrogel; and
incorporated therewith(ii) an active substance which is released through the hydrogel, with at least part of at least one surface of the device comprising (iii) a layer which is impermeable to aqueous media and to said active substance thereby providing control of release of active substance from said device to the extent that at least functionally effective amounts of said active substance are released. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A controlled release device, which comprises:
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(i) a hydrogel, and incorporated therewith; (ii) an active substance which is released through the hydrogel, with at least one surface of the device comprising (iii) a layer which is impermeable to aqueous media and to said active substance, said layer having at least one orifice therein which provides access to said hydrogel component by said aqueous media and control of release of said active substance from said device.
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20. A controlled release device, which comprises:
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(i) a hydrogel of a substituted or unsubstituted cyclic mono- or polyether having from 3 to 6 ring atoms; and
incorporated therewith(ii) a lithium salt as an active substance which is released through the hydrogel, with at least a portion of at least one surface of the device comprising (iii) a layer which is impermeable to aqueous media and to said active substance thereby providing control of release of active substance from said device to the extent that at least therapeutically effective amounts of said lithium salt are released.
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Specification