Canadian application, no grantCanada
Removal of anthraquinone from tall oil and tall oil fractions
CA 2295786 A1 · Owner: Gorman, Gregory S. · Inventors: Gorman, Gregory S.; Lawson, Nelson E.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Anthraquinone is removed from tall oil or tall oil fraction by adsorption with activated carbon. The process is particularly useful in the removal, of anthraquinone from tall oil heads.
Read the whole patent
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 January 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 14, 2000
GrantedNo grant recorded
Term endedJanuary 14, 2020
Patent numberCA 2295786 A1
Classification (IPC)C09F1/02 +2 more
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.