Use of siloxane-based polymers or composites in chemical sensors for detecting nitrate compounds
CA 2548252 C · Owner: Pasquinet, Eric · Inventors: Lebret, Bruno; Hairault, Lionel; Pasquinet, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of at least one type of a polymer comprising a repetitive structural unit of formula (I) wherein X and Y = a simple link or a linear C¿1?-C¿50? group; R¿1? and R¿2? = H CN, C(Z)¿3?, CH(Z)¿2?, CH¿2?Z with Z = halogens; NH¿2? NHR¿3?, NR¿3?R¿4? with R¿3?, R¿4? = halogens CH¿3? or a linear or branched, saturated or unsaturated C¿2?-C¿20? hydrocarbon chain possibly comprising one or several heteroatoms and/or chemical functions containing at least one heteroatom; at least one R1 and R2 different from H; or a compound which comprises said polymer and one or several conductive charges and is used as a sensitive material in a sensor for detecting nitrate compounds. …
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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 December 3, 2004 and granted January 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2024.
- 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.
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.