Process and device for washing
CA 2108679 A1 · Owner: Mueller-Kirschbaum, Thomas · Inventors: Hoefer, Wolfgang; Mueller-Kirschbaum, Thomas; Smulders, Eduard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a process for washing fibrous materials skins, textile, materials or the like using an aqueous surfactant containing washing liquid obtained by adding washing agents to water. The minimal dispensed amounts as determined in subsequent washing tests are always obtained automatically without the cleaning, power and the cleaning efficiency being reduced to unacceptable levels. To this end the surface tension of the washing liquid is measured during the washing processusing a tensiometer. The actual washing agent concentration is derived from these measured values and an initial concentration is derived from the quantity of washing agent added. The detergency is calculated …
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 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.
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.