Process for the production of foams with the aid of branched dodecafluorohexane
CA 2064283 A1 · Owner: Behme, Klaus J. · Inventors: Behme, Klaus J.; Deger, Hans-Matthias; Schutz, Claudia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure: Process for the production of foams with the aid of branched dodecafluorohexane, The invention relates to a process for the production of foams based on polyisocyanates by reaction of polyisocyanates, compounds having at least two hydrogen atoms which are reactive toward isocyanate groups blowing, agents and if appropriate other additives. A blowing agent which consists to the extent of at least 10 mol % of one or more branched dodecafluorohexanes is used here.
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 March 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.