Enhanced lubrication in polyolefin closure with polyolefin grafted cyclodextrin
CA 2531311 C · Owner: Cellresin Technologies, Llc · Inventors: Wood, Willard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermoplastic polymer compositions in a closure can comprise a polymer a modified vinyl polymer and a slip agent or polymer lubricant said modified polymer having a moiety comprising a cyclodextrin compound. The cyclodextrin compound locked into the polymer structure, can absorb impurities permeants, or other undesirable volatile materials. The cooperation between the lubricant the cyclodextrin grafted onto the thermoplastic polymer and the polymer structure can provide barrier properties to a film web or other polymer structure and a surface with substantial lubricity.
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 December 21, 2005 and granted December 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.