Method of preventing break in insulated wire and instantaneous power failure
CA 2296672 C · Owner: Morooka, Yasunari · Inventors: Morooka, Yasunari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aerial distribution cable consisting of insulated wire (1) is laid in parallel with an insulated wire (7) for field relaxation of double the length that causes creepage flashover but does not cause AC dynamic current in the event of lightning surege. The insulated wire (7) for field relaxation is supported in the middle by a support insulator (3) for the insulated wire (1) and is connected with the conductor of the insulated wire (1) at both ends (8). The connections between the two wires are provided with insulating covers (9). This provides preventions against breaks in the insulated wire and instantaneous power failure.
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 May 11, 1999 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2021.
- 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.