Phenolic resins from bisphenol a residual resins and mixtures of chloro-substituted hydrocarbons, and the use of specific phenolic resins as homogenizers for rubber vulcanizates
CA 2085839 A1 · Owner: Bayer Aktiengesellschaft · Inventors: Buysch, Hans-Josef; Loix, Rene; Ooms, Pieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New phenolic resins from bisphenol A residual resins and mixtures of chloro-substituted hydrocarbons and the use of, specific phenolic resins as homogenizers for rubber vulcanizates, A B S T R A C T, New non-curable novolak-like phenolic resins made from residual resins from bisphenol A production and mixtures of at least partially chloro-substituted C4-C8 hydrocarbons are used as homogenizers for rubber vulcanizates. Le A 28 808-foreign countries
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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 December 18, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2014.
- 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.