Substantially dust-free solids and process for dust suppression in solids
CA 2229493 C · Owner: Mcnabb, Andrew J. · Inventors: Webb, Teresa C.; Mcnabb, Andrew J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a substantially dust free solid like ammonium sulfate that is treated with a blend of water or solvents and distillation bottoms. The distillation bottoms are liquid at about 60°C or less and are obtained from production of an alcohol having the formula:, R2-R1-OH wherein R1 is substituted or unsubstituted branched, straight, chain, or cyclic C4 to C12 and R2 is OH or H. The application of such distillation bottoms to the solid hinders the tendency of this solid to generate dust. Thus the resulting solid materials are substantially dust-free, which make them particularly useful in the solids handling industry, especially in the granular fertilizer field. Aslo disclosed are …
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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 March 13, 1998 and granted May 14, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2020.
- 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.