Devices featuring silicone elastomers
CA 2015481 C · Owner: Filas, Robert William · Inventors: Johnson, Bertrand Harold; Wong, Ching-Ping; Filas, Robert William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Devices are described in which certain crosslinked silicone polymers are incorporated. These polymers have various functions such as encapsulating agents surface protective agents or agents to index match optical components (e.g. optical fiber, optical waveguide, etc.) to other optical devices or articles. The polymer is a vinyl-terminated dimethyldiphenylsiloxane copolymer crosslinked with tri-or tetrafunctional silanes in the presence of a platinum catalyst. The phenyl groupcontent of the crosslinked silicone copolymer is adjusted to change the index ofrefraction of the polymer to the optimum for the particular application contemplated. Polymer preparation procedures are described which …
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 April 26, 1990 and granted May 14, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2012.
- 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.