Thermoplastic polymers colored with polyester color concentrates
CA 2101419 A1 · Owner: Pollock, Mark A. · Inventors: Weaver, Max A.; Keegan, Michael J.; Krutak, James J. Sr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Colored thermoplastic polymers comprising a blend of one or more thermoplastic polymers and colored polyesters are provided. Such colored thermoplastic polymers thus provided have uniformity and stability in color hue.
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 February 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2014.
- 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.