Expired Canadian patentCanada
Thermal expansion inhibitor, zero thermal expansion material, negative thermal expansion material, method for inhibiting thermal expansion, and method for producing thermal expansion inhibitor
CA 2575391 C · Owner: Takenaka, Koshi · Inventors: Takagi, Hidenori; Takenaka, Koshi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a thermal expansion inhibitor which has a much broader application range and which can be used with ease. Used is a thermal expansion inhibitor comprising a manganese nitride crystal.
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 29, 2005 and granted September 25, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 29, 2005
GrantedSeptember 25, 2012
Term endedJuly 29, 2025
Patent numberCA 2575391 C
Classification (IPC)C09K3/00 +1 more
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.