Oxide glass compositions for use in optical fibres
CA 1210784 A · Owner: British Telecommunications Public Limited Company · Inventors: Partington, Sally; Beales, Keith J.; Smith, Dennis G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A oxide glass composition which consists of the following components:, Na2O 17 to 21 mole % B2O3 14 to 20 mole %, Al2O3 1 to 3 mole % MgO 1 to 3 mole %, ZnO 1 to 3 mole %, SiO2 47 to 66 mole % other oxides not more than 3 mole %, This composition can be used as a cladding for low loss core compositions in optical fibres and has high, durability.
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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 September 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2003.
- 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.