Opaque, colour-pigmented coating
CA 2494339 A1 · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Tittmann, Rolf
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 coating having a thickness of from 5 to 25 ~m comprising a high-molecular-weight organic material and from 5 to 9 g/m2 colored pigments, wherein, based on the total amount of colored pigments (a) , from 30 to 90 % by weight of 3,6-di(4'-biphenyl)-2,5-dihydro-pyrrolo3,4-cpyrrole-1,4-dione having a specific surface area of from 20 to 50 m2/g and (b) from 10 to 70 % by weight of a further organic colored pigment selected from , the series consisting of quinacridone diketo-pyrrolo3,4-c-pyrrole, dioxazine indanthrone, perylene, phthalocyanine and 3-amino-1H-isoindol-1-oneoximatometal complex pigments and solid solutions and mixtures thereof are , present.
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 30, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2025.
- 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.