Bioerodible polymers for drug delivery in bone
CA 2056384 C · Owner: Gerhart, Tobin N. · Inventors: Laurencin, Cato T.; Gerhart, Tobin N.; Hayes, Wilson C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bioerodible polymers which degrade completely into nontoxic residues over a clinically useful period of time including, polyanhydrides, polyorthoesters polyglycolic acid, polylactic acid, and copolymers thereof are used for the delivery of bioactive agents, including antibiotics, chemotherapeutic agents inhibitors of angiogenesis, and simulators of bone growth directly into, bone.
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
- Filed June 1, 1990 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2012.
- 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.