Spherical, colored polyester particles, process for their preparation, and their use for powder coatings
CA 2281605 A1 · Owner: Blatter, Karsten · Inventors: Simon, Peter; Blatter, Karsten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns homogeneously tinted polyester particles of an average size < 50 µm, having a monomodal granulometric distribution per particle (=d90-d10/d50)2,5. At temperatures < 200 ~C these particles can be molten to , form a continuous coating. The invention also relates to the process of production of same and their use as powder lacquers. In the preferred embodiment, the particles contain units of formulae (1) -CO-X-CO and (2) -O-D- O-, in which X represents a substituted or non-substituted aromatic residue C6 to C14 or an alkylene, polymethylene, cycloalkane or dimethylene-cycloalkane group or an alkandiyle group in a straight or branched chain possibly , unsaturated, …
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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 February 11, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2020.
- 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.