Hard-surface cleaning compositions
CA 2028512 A1 · Owner: De Waele, Johan K.E. · Inventors: Corn, Ian; De Waele, Johan K.E.; Koenig, Axel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Liquid hard surface cleaning composition as described which comprises anionic surfactant ammonium salts ethanol, n-butoxypropanol and a primary or secondary alcohol having a C5 alkyl branched or linear. The composition which may also comprise ammonium and n-propoxypropanol are especially suitable for use as a spray composition.
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 October 25, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2012.
- 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.