New oligomeric organosilanepolysulfanes, their use in rubber mixtures and for preparing moulded articles
CA 2273873 A1 · Owner: Batz-Sohn, Christoph · Inventors: Batz-Sohn, Christoph; Luginsland, Hans-Detlef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to oligomeric organosilanepolysulfanes which are built up from the three structural units A and/or B and/or C, (see formula I) in which Y = H, CN, -(CH2) n SiRR1R2;, n = 1-8 R, R1, R2 and R3, independently, represent H (C1-C4), alkyl, (C1-C4) alkoxy, halogen or a OSiR1R2R3 group; x, as a statistical average, is 1 - 6, z as a statistical average, is 2 - 6, n is 1 - 8 and o, p and q are each a whole, positive number between 1 and 40 where o + p + q may be ~ 2 and < 40 with the, proviso that at least one structural unit A or B is present, and their use in rubber mixtures and to produce moulded items, in particular pneumatic tyres.
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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 June 9, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2021.
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Timeline
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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.