Process for producing polyalkenamers with increased cis-double bond configuration
CA 1266492 C · Owner: Zerpner, Dieter · Inventors: Zerpner, Dieter; Streck, Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for producing polyalkenamers with increased cis-double bond configuration by ring-opening polymerization of cis,cis-1,5-cyclooctadiene or 2-norbornene in the presence of isoprene and/or a cyclic olefin with a double-bond pair in the 1,3-position. The polyalkenamers with increased cis-double bond configuration have lower crystallinity and melting point where the molecular weight is high, or are oils where the molecular weight is low.
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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
- Granted March 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2007.
- 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.