Two step method for preparation of controlled release formulations
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 8, 1992
Issued Date -
N/A
app pub date -
Jan 23, 1991
filing date -
Mar 31, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Active substances intended for topical application are incorporated in novel formulations in which they are retained as impregnants inside the pores of porous solid particles or microspheres. The pores form a continuous network open to the exterior of the particles, permitting outward diffusion of the impregnants at a controlled rate depending on the pore size. The impregnated particles are prepared by impregnation of preformed particles with the active substance.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully