Silanol enzyme inhibitors
CA 2258685 A1 · Owner: Chen, Chien-An · Inventors: Mutahi, Alfred M.; Chen, Chien-An; Sieburth, Scott Mcn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I, II, or III), wherein X is OH; Y is OH H, lower alkyl , of one to six carbons or heteroatoms or F; Z and Z' are independently H lower , alkyl or Q3Si where Q is lower alkyl or aryl; n is 3-50; n' is 2-50; A and B are independently a) alkyl of one to ten carbons or heteroatoms b) aryl of , four to ten carbons or heteroatoms c) cyclic of three to ten carbons or , heteroatoms or moieties of the formulas (d, e, or f); R1-R11 groups are each independently hydrogen, alkyl of one to ten carbons or heteroatoms aryl of 4 , to 14 carbons or heteroatoms arylalkyl of five to twenty carbons or heteroatoms; unsubstituted carbonyl or substituted carbonyl. Heteroatoms are …
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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 11, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2019.
- 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.