Method for producing carbon-coated optical fiber
CA 2003119 C · Owner: Oohashi, Keiji · Inventors: Araki, Shinji; Shimomichi, Tsuyoshi; Oohashi, Keiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method for producing carbon-coated optical fiber including the steps of thermally decomposing a halogenated hydrocarbon compound to obtain a thermal decomposate of the halogenated hydrocarbon, and depositing the thermal decomposate on a surface of an uncoated optical fiber to form at least one carbon coating layer on the surface thereof. The halogenated hydrocarbon compounds include ones which contain at least one chlorine atom in molecule thereof, or ones whose hydrogen atoms totally substituted by halogen atoms. The deposition is performed at a temperature which is slightly below the thermal decomposition temperature. The method further comprising the step of coating at …
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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
- Filed November 16, 1989 and granted June 18, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2011.
- 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.