Filled elastomeric butyl compounds with improved scorch safety
CA 2412709 A1 · Owner: Hopkins, William · Inventors: Hopkins, William; Resendes, Rui
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a process for preparing a filled halobutyl elastomer which comprises mixing a halobutyl elastomer particles of filler an additive, containing both amino and alcohol functional groups and one or more, hydrated metal halogenides and optional curing the filled elastomer with sulfur, or other curative systems. Those compositions have improved properties when compared to known carbon black-filled halobutyl elastomeric compositions combined with an enhanced scorch safety. This invention has the advantages of (a) not evolving alcohol either during the manufacture or subsequent use of the article manufactured from the compound and (b), maintaining good processability of the …
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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
- Filed November 25, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2024.
- 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.