Method of measuring quantity of heat applied to optical fiber
CA 1316719 C · Owner: Fujikura Ltd. · Inventors: Onodera, Tsutomu; Yamada, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, In a method of measuring a quantity of heat the, distance between the position of an end of an exposed fiber portion before heating and the position of the end after heating is measured, and the quantity of heat applied to the end of the exposed fiber portion is calculated based on the distance. When heat is applied to an end of an exposed fiber portion, the end is fused and is rounded due to surface tension. For this reason the position of the end of the exposed fiber portion retracts from the position it occupied before heating by the volume required for rounding the end. This retraction amount corresponds to a quantity of heat applied to the end of the exposed …
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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 April 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 2010.
- 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.