Polybutadienes with a reduced solution viscosity/mooney viscosity ratio
CA 2354176 A1 · Owner: Steinhauser, Norbert · Inventors: Steinhauser, Norbert; Obrecht, Werner
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 process for the preparation of polybutadienes with a reduced solution viscosity/Mooney viscosity ratio by using polydienyl compounds, the polybutadienes which can be prepared in this process, the use of the polybutadienes according to the present invention for the preparation of rubber mixtures the use of the rubber, mixtures for the production of all types of shaped articles and the, compound dimethyldi-2,4-pentadienyl-(E,E)-silane as an intermediate product.
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 July 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 2023.
- 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.