Weather-resistant molded parts based on polyisocyanate polyaddition products
CA 2095954 A1 · Owner: Muller, Hanns P. · Inventors: Muller, Hanns P.; Gronen, Jurgen; Jansen, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-3881, LeA 29,084, WEATHER-RESISTANT MOLDED PARTS BASED ON POLYISOCYANATE POLYADDITION PRODUCTS ABSTRACT OF THE DISCLOSURE, The present invention relates to the use of organic compounds which contain epoxide groups and which are subjected to a heat treatment at 30 to 150°C in the presence of an alkylating agent, as auxiliary substances to increase the weather resistance of molded plastic parts. These molded parts are produced by the reaction injection molding technique and the process comprises reacting reaction mixtures based on polyisocyanate polyaddition products. Le A 29 084-US
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 May 11, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2015.
- 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.