Aliphatic, low-emission thermoplastic polyurethane moulding materials suitable for sintering
CA 2315765 A1 · Owner: Heidingsfeld, Herbert · Inventors: Kaufhold, Wolfgang; Hoppe, Hans-Georg; Heidingsfeld, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to polyurethane moulding materials which can be processed thermoplastically in the form of sintered powder and are suitable for producing textured sinter films, made exclusively from linear alphatic components. The polyol component consists of between 30 and 80 parts by weight of an aliphatic polycarbonate diol with a mean molecular weight <o>M</o>n of between 1,000 and 2,200 and between 70 and 20 parts by weight of a polybutane diol adipate and/or a polycaprolactone diol with a mean molecular weight <o>M</o>n of between 1,000 and 2,400. The mixture also contains 1,6hexamethylenediisocyanate at an equivalence ratio of between 2.3:1.0 and 6.2:1.0 in relation to …
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 December 10, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.