Polyester resin composition and bottle produced from the resin composition
CA 2264857 A1 · Owner: Ogishita, Masatoshi · Inventors: Ogishita, Masatoshi; Hata, Masanori; Kanesaki, Tateo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A resin composition comprising polyethylene terephthalate and polyethylene naphthalate, a process for producing the composition a bottle produced from , the composition and a process for producing the bottle. The resin composition is prepared by melt-mixing (A) polyethylene terephthalate with (B) polyethylene naphthalate in such a ratio that the proportion of ethylene naphthalate units is 5 to 15 mol % based on the sum of (A) and (B) with an extrusion kneader while regulating the ratio of the extruder output to the rotational speed of the screw to 0.1 to 1.4 kg/hr.rpm. The composition has a degree of transesterification of 20 % or lower and despite this, can give , bottles with high …
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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 July 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2020.
- 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.