Process for producing trihydrocarbyl aluminum
CA 2265714 C · Owner: Nishida, Tadao · Inventors: Koga, Seijiro; Kawanishi, Kaoru; Nishida, Tadao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing trihydrocarbylaluminums in high yields from an aluminum/magnesium alloy and a halogenated hydrocarbon characterized by using , the alloy pulverized by means of a ball mill or vibrating mill and/or conducting the reaction by stirring with an abrasive medium or by using a homogenizer which rotates at a high speed in the course of the reaction.
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 July 17, 1998 and granted July 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 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.