Disulfides, their preparation and their use
CA 2073524 A1 · Owner: Schrepp, Wolfgang · Inventors: Keller, Harald; Fuchs, Harald; Schrepp, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O.Z. 0050/42619, Abstract of the Disclosure: Disulfides of the general formula, X1-(CH2)n-S-S-(CH2)n-X2, where X1 and X2 are identical to one another and are each -Br, -N-phthalimide, -NH2, -OOC-(CH2)3-COOH -OSO2-CH3, -NH-(CH2)2-NH2, -SO3H or -SO3-M+ in which M+ is an alkali metal ion and n is from 11 to 25, or X1 is -OH and X2 is -Br or X1 and X2 are each -COO-CH2-CH3 and n is from 10 to 25, are suitable for the production of monomolecular layers on noble metal substrates and for the production of multimolecular layers.
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 July 9, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 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.