Organopentasiloxane and method for the preparation of same
CA 2060147 A1 · Owner: Dow Corning Toray Silicone Company, Ltd. · Inventors: Okawa, Tadashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Organopentasiloxane and Method for Its Preparation Abstract, This invention relates to a process for preparing an organopentasiloxane with the following formula, wherein A is the hydrogen atom or an aliphatically unsaturated monovalent hydrocarbon group R is the same, or different monovalent hydrocarbon group and n is an, integer with a value of 2 to 4 which carries, silicon-bonded hydrogen or a silicon-bonded aliphatically unsaturated monovalent hydrocarbon group at one molecular chain terminal and silicon-bonded organoxy group(s) at the other terminal.
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 January 28, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 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.