Canadian application, no grantCanada
Stabilization of poly(hydroxy acid)s
CA 2128581 A1 · Owner: Kelly, William E. Jr. · Inventors: Kelly, William E. Jr.; Baird, Richard L.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Stabilization of poly(hydroxy acid)s particularly poly(lactic acid), to, thermal processing with selected boron compounds is disclosed. The most preferred stabilizer is boric oxide (B2O3).
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 July 21, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 21, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 21, 1994
GrantedNo grant recorded
Term endedJuly 21, 2014
Patent numberCA 2128581 A1
Classification (IPC)C07C69/67 +2 more
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.