Warp-free pigment compositions comprising diaryldiketopyrrolo¬3,4-c pyrroles
CA 2269587 A1 · Owner: Flandrin, Franck Rey · Inventors: Flandrin, Franck Rey; Bugnon, Philippe; Hu, Guo-Hua
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of compounds of the formula (see formula I), R1, R2, R3 and R4 independently of one another are hydrogen halogen, R6, OR6 , or SR6, R5 is, hydrogen or linear or branched C1-C12alkyl benzyl or phenethyl, and R6 is an , apolar group which is unsubstituted or substituted one or more times by halogen or by OC1- C6alkyl, with, the proviso that if R5 is hydrogen R1, R2, R3 or R4 is R6, OR6 or SR6, as additives in the, pigmentation of partially crystalline plastics especially those processed by , injection moulding, with pigments containing at least one each of groups and , which, are joined to one another as or are in conjugation with one another. Preferred …
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 April 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2021.
- 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.