Controlled release composition and process for preparing same

Details Controlled release composition and process for preparing same Controlled release composition and process for preparing same

1975-10-23

1981-01-13

Lovering, Richard D.

Drug, bio-affecting and body treating compositions

Solid synthetic organic polymer as designated organic active...

Polymer from ethylenic monomers only

127 30, 252 1, 252182, 252316, 264109, 424 33, 427189, 427190, 427195, 427221, A01N 2526, A61J 310, A61K 924, B05D 312

Patent

active

042449413

ABSTRACT:
Solid constant release composition wherein (a) the solution of soluble core substance within the core space remains saturated during dissolution and (b) the shape and (c) the surface of the coating and (d) the diffusion path for the soluble core substance through the porous coating remains constant while the composition is in a liquid medium, which composition is very useful in media in which constant release during substantially the whole release period is desired, for example, for medical, chemical and fermentation purposes.

REFERENCES:
patent: 3096248 (1963-07-01), Rudzki
patent: 3259482 (1966-07-01), Hansen
patent: 3415758 (1968-12-01), Powell et al.
patent: 3453360 (1969-07-01), Hill
patent: 3459850 (1969-08-01), Riva
patent: 3485914 (1969-12-01), Corn
patent: 3577514 (1971-05-01), Robinson
patent: 3732172 (1973-05-01), Herbig et al.

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