Fibrous additive for fluxed bitumen, and method for producing same
CA 2261844 A1 · Owner: Rieunier, Jean-Baptiste · Inventors: Kafka, Bernard; Rieunier, Jean-Baptiste
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mineral fibre additives for enhancing the properties of bitumen are disclosed. A mineral fibre additive for fluxed bitumen is provided wherein the fibres are agglomerated into nodules before being added to the bitumen and the additive comprises a water- and heat-stable binder previously treated with a wetting agent for wetting the fibres with the bitumen. The water- and heat-stable binder preferably consists of phenolic resins of the kind usually used in insulating fibre mats made of either glass wool or rock wool. Similarly the wetting agent advantageously consists of silicone resins. A method is also provided for producing said additive. According to the method (a) fibres are taken from a …
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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 July 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2019.
- 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
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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.