Expired Canadian patentCanada
Cement-free zeolite and fly ash settable fluids and methods therefor
CA 2575212 C · Owner: Luke, Karen · Inventors: Santra, Ashok K.; Luke, Karen; Reddy, B. Raghava
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Zeolite and Class F fly ash compositions are provided for use as cement-free settable fluids such as settable spotting fluids and cementitious compositions.
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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 1, 2005 and granted May 1, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 1, 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 1, 2005
GrantedMay 1, 2012
Term endedJuly 1, 2025
Patent numberCA 2575212 C
Classification (IPC)C04B22/00 +2 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.