3-hydroxybutyrate polymer composition
CA 2017885 C · Owner: Webb, Andrew · Inventors: Herring, John M.; Webb, Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyhydroxyalkanoate composition in which organophosphonic or organophosphinic acids esters and derivatives, thereof together with oxides hydroxides or carboxylic acid salts of Group I to V metals are included as nucleating agents. A process for the production of the composition is also claimed. The composition is particularly a 3-hydroxybutyrate polymer composition.
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 May 30, 1990 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 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.