Thermoplastic elastomeric block copolymers
CA 2011597 C · Owner: Van Der Huizen, Adriaan A. · Inventors: Van Der Huizen, Adriaan A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermoplastic elastomeric block copolymers of general formula BDB' (I) or of general formula (B"E)nX wherein each of B,B',B", comprises a substantially linear substantially pure polyethylene, block having a melting temperature ~ 110°C, as determined via differential scanning calorimetry; D and E are substantially linear elastomeric polymer blocks being, substantially free from olefinic unsaturation; the molecular weight distribution (Mw/Mn) of B,BD BDB',B" and B"E is ~ 2; X is a terminal coupling agent-based entity and n is an integer ~ 2.
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 March 6, 1990 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2012.
- 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.