Chemiluminescent 1,2-dioxetanes
CA 2342979 C · Owner: Giri, Brij P. · Inventors: Giri, Brij P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Chemiluminescent 1,2-dioxetanes derived from substituted aromatic esters or ketones and spiro-fused ketones with either .pi.-electron system in the ring or with carbon-carbon double bond or triple bond(s) in the spiro-fused ring are provided herein. These 1,2-dioxetanes have electron donating or withdrawing groups at the four-membered peroxide ring thus, the 1,2-, dioxetanes ring hereof is affected by the added electronic charge.
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 September 8, 1999 and granted May 10, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2021.
- 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.