Production process of parts having the general appearance of natural stones and parts obtained thereof
CA 2034304 C · Owner: L'Oreal · Inventors: Gueret, Jean-Louis H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for manufacturing parts having the appearance of natural stones from a composition consisting of a coloured or uncoloured matrix of thermoplastic resin and per 100 parts by volume of this matrix 0.2 to 80 parts by volume of at least two fillers chosen from among natural fibres carbon fibres and mineral or vegetable fillers having different grain sizes or dimensions. By selecting the colour of the matrix and the number proportion, grain size and colour of the various fillers it is possible to imitate the general appearance and colours of natural stone. The parts obtained after shaping can be used for their esthetic qualities in particular in packaging cosmetics.
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 January 16, 1991 and granted June 2, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2013.
- 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.