Method to produce bowls of a plastic material and bowls thus produced
CA 2129409 A1 · Owner: Plastic Legno Giocattoli Di Contessi & C. Snc · Inventors: Contessi, Claudia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method to produce bowls of a plastic material whereby, polypropylene is mixed with an additive and/or dye after suitable dosing and is introduced into a moulding press wherein it is heated to 180-210°C, and is then injected into a mould, where it is kept under a further pressure for 20-60 seconds, the product then being extracted and cooled in water before removal of flash so as to produce the bowl. Bowl consisting of polypropylene and produced according to the above method.
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 August 3, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 2016.
- 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.