Cyano-ether polyalkylsiloxane hydrides
CA 1069525 A · Owner: Union Carbide Corporation · Inventors: Prokai, Bela; Kanner, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cyano-ether polyalkylsiloxane hydrides are provided which comprise monofunctional siloxy units and difunctional siloxy units, an average of between about 2 and about 100 silicon-bonded cyano-bearing ether groups for every two moles of monofunctional units, said cyano-bearing ether groups having the formula, -(O)qR'OR"CN, wherein q is zero or one R' is, bivalent alkylene of 3 to 8 carbon atoms and R" is bivalent alkylene of 2 to 4 carbon atoms and an average, of between about 2 and about 30 silicon-bonded nydrogen atoms for every two moles of monofunctional units said, monofunctional units having at least two alkyls bonded to the respective silicon atoms thereof and the difunctional units …
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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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.