Methods for monitoring sulfonyl halide functional group content of materials
CA 2376502 A1 · Owner: Morrissey, John Patrick · Inventors: Crosby, Peter; Morrissey, John Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for monitoring the sulfonyl fluoride functional group content of a material in order to determine the degree of conversion of said sulfonyl fluoride functional groups into other functional groups; said method comprising measuring the absorbance of electromagnetic radiation transmitted through the material, said electromagnetic radiation being of an intensity and frequency such that it is at least partially but not entirely, absorbed by , the sulfonyl fluoride functional groups within the material.
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 June 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2022.
- 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.