Controlled release bioerodible drug delivery system
CA 1311686 C · Owner: Ciba-Geigy Ag · Inventors: Shell, John Weldon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A dosage composition for controlled release of a pharmaceutical compound to body fluids such as the tears of the eye, or surgical site fluids, has an external matrix rapidly soluble in said fluids, and bioerodible microparticles dispersed in the external matrix the, microparticles containing the pharmaceutical compound and being capable of releasing it gradually and in controlled fashion to the body fluids, and being of a size to be retained for a period of time long enough to provide an effective dose of the pharmaceutical compound to the site of placement for an extended period of time. The microparticles ultimately dissolve in the body fluids.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.