Composition useful as an adhesive for installing vehicle windows
CA 2531386 C · Owner: Dow Global Technologies Llc · Inventors: Heberer, Daniel P.; Zhou, Lirong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is an composition comprising: a) one or more isocyanate functional polyether based prepolymers; b) one or more isocyanate functional polyester prepolymers wherein the one or more polyesters used to prepare the prepolymers having melting points of from 45 to 59~C; c) one or more polyisocyanates having a nominal functionality of 3 or greater; d) one or more nonconductive carbon blacks; e) one or more catalysts for the reaction of isocyanates moieties with hydroxyl groups. In a preferred embodiment the composition of the invention further comprises one or more isocyanate functional polyester prepolymers wherein the one or more polyesters used to prepare the prepolymers …
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 19, 2004 and granted March 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2026.
- 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.