Prevention of deposits
CA 2315889 A1 · Owner: Gluesen, Birgit · Inventors: Block, Christian; Gluesen, Birgit; Welling, Hermann-Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a composition that prevents deposits on heating rods during the machine washing of textiles. Said composition comprises in one embodiment a laundry detergent or cleaning product comprising a polycarboxylate having a molecular mass of less than 4000 g/mol as measured by means of GPC against a polyacrylate standard. In another embodiment it comprises a coarse-particled laundry detergent or cleaning product or compound therefor having an average particle size of between 0.2 and 4.0 mm which, comprises a polymeric polycarboxylate having a molecular mass of less than 1000 g/mol as measured by means of GPC against a polyacrylate standard.
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 August 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.
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.