Detergent composition
CA 2134331 A1 · Owner: Houghton, Mark P. · Inventors: Houghton, Mark P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cleaning composition comprises an alkali metal carbonate detergency builder with a seed crystal material therefor and a heavy metal sequestrant. To avoid deleterious interactions with the seed crystal material, the sequestrant is immobilised on a high surface area solid support medium. The composition may be in the form of powders, aqueous liquids, substantially non-aqueous liquids gels or pastes.
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 April 23, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2015.
- 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.