Microcellular thermoset foams and process for their production
CA 2305246 C · Owner: Rakutt, Dietmar · Inventors: Daum, Ulrich; Rakutt, Dietmar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to microcellular rigid foams with a matrix consisting of cross-linked duromers, especially of polytriazine resins and with an apparent , density of 20 to 95 % of the density of the compact matrix material. The inventive rigid foams are highly stable and highly temperature-resistant and are suitable for use e.g. as material for aircraft lining.
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 October 27, 1998 and granted August 2, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 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.