Organosilicon compounds having a cage-like structure
CA 2123549 A1 · Owner: Freyer, Christian · Inventors: Wolferseder, Josef; Freyer, Christian; Peetz, Udo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of Disclosure, Organosilicon compounds of the formula (RSiO3/2)Z (I), in which, z is 4, 6, 8 10, 12 or 14, and, R can be identical or different and represents a hydrogen atom an organic radical or radicals of the formula R13SiO(SiR22O)n- (II), in which, R1 can be identical or different and represents a hydrogen atom an organic radical or an organosilicon radical R2 can be identical or different and represents a hydrogen atom or an organic radical and, n is n or an integer with the proviso that the organosilicon compound of formula (I) contains at least one radical R of formula (II) where n >O.
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 May 13, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 13, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2016.
- 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.