Oil-based paint
CA 2019040 C · Owner: Chroma Australia Pty Limited · Inventors: Cobb, James C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil-based artist paint composition is disclosed in which a plasticizer is included that acts to circumvent embrittlement of a dried paint film on ageing. The invention has particular application to artists' paint compositions that are linseed oil based. A preferred plasticizes is butyl polyacrylate. In a preferred embodiment alkyd resins are included, in the composition to reduce the tendency of paint films to shrink on ageing and "creep" when used in very heavy impasto applications.
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 June 14, 1990 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 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.