Polyhydroxyalkanoate biopolymer compositions
CA 2328471 C · Owner: Cj Cheiljedang Corporation · Inventors: Skraly, Frank A.; Peoples, Oliver P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Several novel PHA polymer compositions produced using biological sytems include monomers such as 3-hydroxybutyrate 3-hydroxypropionate, 2-, hydroxybutyrate 3-hydroxyvalerate, 4-hydroxybutyrate, 4-hydroxyvalerate and 5hydroxyvalerate. These PHA compositions can readily be extended to incorporate additional monomers including, for example 3-hydroxyhexanoate, 4-, hydroxyhexanoate 6-hydroxyhexanoate or other longer chain 3-hydroxyacids containing seven or more carbons. This can be accomplished by taking natural PHA producers and mutating through chemical or transposon mutagenesis to delete or inactivate genes encoding undesirable activities. Alternatively the , strains can be genetically …
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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 21, 1999 and granted September 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2021.
- 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.