Method for surface treatment of powdery and granular material stored in open air
CA 1250416 A · Owner: Nippon Oil Co. Ltd. · Inventors: Yokoyama, Nobuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a method of surface treatment characterized by applying a surface treating agent to a powdery and granular material stored in the open air said, surface treating agent being an emulsion containing 0.5 to 50% by weight of a solid material as an essential component and the residue thereof being water, said solid material comprising (I) 100 parts by weight of a petroleum wax component selected from the group consisting of slack waxes with 1% by weight or more of an oil content, slack microcrystalline waxes with 1% by weight or more of an oil content, paraffin waxes microcrystalline waxes, and mixtures thereof and (III) 5 to 500 parts by weight of a polymer …
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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 February 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 28, 2006.
- 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.