Canadian application, no grantCanada
Cement admixture and defoaming agent
CA 2071734 A1 · Owner: W.R. Grace & Co.-Conn. · Inventors: Gartner, Ellis M.; Myers, David F.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water-soluble alkylated alkanolamine salts useful as a defoaming agent with respect to aqueous organic containing solutions and as an admixture for cement-based compositions.
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 June 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 19, 1992
GrantedNo grant recorded
Term endedJune 19, 2012
Patent numberCA 2071734 A1
Classification (IPC)C04B24/12
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.