Polyester stretch blow bottle and production thereof
CA 2231979 C · Owner: Hata, Isao · Inventors: Takahashi, Koji; Hata, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stretch blow bottle made from a polyester resin composition which comprises: (A) 60 to 99% by weight of a polyethylene terephthalate resin and (B) 1 to 40% by weight of a polyethylene isophthalate resin, wherein 300 square microns of a section exposed by cutting the neck of the bottle contains less than one particle of the polyethylene isophthalate resin (B) having a diameter of 0.1 micron or above in the polyethylene terephthalate resin (A) as the matrix.
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 March 12, 1998 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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.