Silicone resins having good thermal stability
CA 1102486 A · Owner: General Electric Company · Inventors: Merrill, Duane F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a silicone resin composed solely of difunctional siloxy units comprising hydrolyzing a diorganodihalosilane in a heterogeneous hydrolysis mixture having therein water, acetone, a water-immiscible organic solvent and optionally, an alcohol; wherein said hydrolysis must take place within ten minutes, and separating the water layer from the water-immiscible solvent silicone resin layer The silicone resin is further purified and bodied in subsequent process steps. There is also provided by the present invention a silicone resin mixture composed of the above difunctional silicone resin and a silicone resin composed of trifunctional siloxy units and difunctional siloxy …
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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
- Granted June 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 1998.
- 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.