Cyclic silethynyl polymers and a method for making them
CA 1321598 C · Owner: Parbhoo, Bhukandas · Inventors: Bortolin, Roberto; Parbhoo, Bhukandas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cyclic silethynyl polymers having at least 4 silicon atoms, per polymer have the average formula, Preferably x has a value of 5 or 6 and each R is independently, methyl or phenyl. They are prepared by reacting a lithium salt of one or more diethynylsilanes with one or more dihalosilanes. These polymers are useful for example in semi- or photoconductive applications.
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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 August 24, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 2010.
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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.