Canadian application, no grantCanada
Use of organofunctionally modified polysiloxanes in the production of polyurethane foam
CA 2298239 A1 · Owner: Burkhart, Georg · Inventors: Weier, Andreas; Burkhart, Georg
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 invention provides for the use of a mixture of Si-C- and Si-O-C-linked silicone polyether block copolymers as an additive in the production of polyurethane foam.
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 February 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 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.
FiledFebruary 8, 2000
GrantedNo grant recorded
Term endedFebruary 8, 2020
Patent numberCA 2298239 A1
Classification (IPC)C08J9/42 +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.