Polyether urethanes, their production and their use as antistatic additives in polyamide compositions
CA 1089487 A · Owner: Bayer Aktiengesellschaft · Inventors: Kunzel, Hans E.; Bentz, Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to new polyether urethanes corresponding to the general formula, in which R' and R" independently of one another represent a member selected from the group consisting of a straight-chain cyclic or branched, saturated, or unsaturated aliphatic hydrocarbon radical a straight-chain, cyclic or, branched, saturated or unsaturated aliphatic hydrocarbon radical containing hetero atoms, an aralkyl radical, an aromatic radical and an alkyl-substituted aromatic radical, at least one of the two radicals R' and R" comprising an alkyl radical with from 10 to 30 carbon atoms R'" represents a member, selected from the group consisting of hydrogen atom an alkyl group with, …
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
- Granted November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 1997.
- 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.