Polymers containing bispyrazole units
CA 2077569 A1 · Owner: Muehlebach, Andreas · Inventors: Muehlebach, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymers containing bispyrazole units Abstract of the Disclosure, The invention relates to polymers having an average molecular weight Mn greater than 1000, consisting of identical or different repeating units of formula I (I), wherein R1, R2, R3 and R4 are each independently of one another hydrogen C1-C4alkyl, C6-C10aryl or -OR5, wherein R5 is hydrogen or C1-C4alkyl X is a direct bond or a divalent aliphatic or araliphatic radical containing up to 20 carbon atoms, and, Q is a divalent alkyl, cycloalkyl aralkyl or aryl radical or a heterocyclic radical and to compositions comprising bispyrazole polymers of formula I.
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 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2014.
- 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.