Supramolecular pairing system, its preparation and use
CA 2301641 A1 · Owner: Eschenmoser, Albert · Inventors: Scherer, Stefan; Miculka, Christian; Windhab, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a compound of formula (I) wherein R1 is NR3R4, OR3 , or SR3 with R3 and R4 being H or CnH2n+1 independently of each other and being the same or different, n being a whole number from 1 to 12; R2 is equal to CmH2m-C(X)-Y with X being =O, =S or =N Y being equal to OR3, NR3R4 or SR3, R3 and R4 having the same meaning given above and m being a whole number from 1 , to 4; or R2 is equal to CmH2m-Z-Y' with Z being a sulfonyl phosphonyl, ether , or amine group, Y' being equal to H CnH2n+1, OR3, NR3R4 or SR3 then Z is , sulphonyl or phosphonyl group n, R3 and R4 having the meaning given above and Y' being equal to CnH2n+1 when Z is an ether or an amine group; A B, and , …
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 21, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2020.
- 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.