Canadian application, no grantCanada
Use of polyvinyl alcohols as soil release detergent additives
CA 2312154 A1 · Owner: Welling, Hermann-Josef · Inventors: Speckmann, Horst-Dieter; Block, Christian; Poethkow, Joerg
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The cleaning performance of laundry detergents was to be improved. This was essentially achieved by using polyvinyl alcohol.
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 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 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.
FiledJune 23, 2000
GrantedNo grant recorded
Term endedJune 23, 2020
Patent numberCA 2312154 A1
Classification (IPC)C11D3/37 +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.