Novel polyureas based on ipdi, hdi, their isocyanurates and amines
CA 2356006 A1 · Owner: Weiss, Jorn-Volker · Inventors: Weiss, Jorn-Volker; Grenda, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a novel polyurea based on (A) an isocyanate compound that is isophorone diisocyanate (IPDI) hexamethylene diisocyanate (HDI) or their isocyanurate and (B) a diamine or polyamine, such as isophorone diamine (IPD). The polyurea remain stable in a solid form at a curing temperature of 150-220ÀC standard for powder coating without releasing a significant quantity of organic materials or water and is useful in the paint industry.
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 August 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2023.
- 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.