Masterbatches having high levels of resin, in particular for modifying polymers
CA 2365184 A1 · Owner: Klosiewicz, Daniel, W. · Inventors: Klosiewicz, Daniel, W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Masterbatch including at least about 65 wt.% of resin having a R & B softening point as measured in accordance with ASTM 28-67. The masterbatch also includes a carrier polymer having a peak melting temperature as measured by DSC, up to , about 20 ~C greater than the R & B softening point of the resin. A masterbatch pellet made by a method, including mixing a resin having a R & B softening point as measured in accordance with ASTM 28-67 and a carrier polymer having , a peak melting temperature as measured by DSC, up to about 20 ~C greater than the R & B softening point of the resin to form masterbatch composition , including at least about 65 wt.% of resin. The method of making the …
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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 March 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2022.
- 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
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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.