Preform for polyester bottle
CA 2068517 C · Owner: Wellstar Holding B.V. · Inventors: Mreijen, Hubertus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a preform for a polyester bottle, having applied to its surface a coating of a material that lowers the coefficient of friction of the polyester and to a method of producing a preform for a polyester bottle provided, with a coating of a material that lowers the coefficient of friction of the polyester used, comprising producing a preform by means of extrusion or injection moulding followed by applying, said coating to the preform.
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 September 13, 1990 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 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.