Additive concentrates
CA 2116482 A1 · Owner: Scott, Richard M. · Inventors: Shaw, Robert W.; Scott, Richard M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides an additive concentrate comprising an inert carrier fluid and from 10 to 80%w based on the total, concentrate, of a compound of the general formula (I), in which R1 and R2 each represent a hydrogen atom or together, represent a carbon-carbon single bond; each of R4 and R5 independently represents a hydrogen atom or a C1-C20 alkyl or, phenyl group, each of which may be optionally substituted; R6 represents a hydrogen atom, or a C1-C20 alkyl or phenyl group each, of which may be optionally substituted and R7 represents a group -CH2-NHR8 in which R8 represents an optionally substituted alkyl group, or a group -COX wherein X represents an optionally substituted alkoxy …
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 February 25, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2016.
- 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.