Aqueous based solvent free cleaner compositions containing two nonionic surfactants
CA 2233911 C · Owner: Basf Corporation · Inventors: Patterson, Sonia J.; Kerobo, Charles O.; Gessner, Suzanne M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an aqueous based solvent free degreaser, composition, comprising a blend of two nonionic surfactants selected from alcohol, alkoxylate with a fatty alcohol moiety fatty alcohol, fatty alcohol having oxyethylate moieties, polyoxyalkylene block copolymers and alkyl phenol alkoxylate.
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 30, 1998 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2020.
- 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.