Bushing for electrical equipment
CA 2063096 A1 · Owner: Anderson, Robert H. · Inventors: Anderson, Robert H.; Meloun, Roger Allan; Thompson, Mac A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An insulating bushing according to the present invention comprises an electrical conductor, a primary bushing surrounding the conductor, a protective shield surrounding a portion of the primary bushing, and an insulating elastomeric filler which occupies the interstitial space between the primary bushing and the protective shield. The electrical conductor is a metal rod which extends through an aperture in an electrically conductive surface such as a containment wall for gas-insulated electrical equipment. The primary bushing is a conically tapered casting of an insulating plastic material which extends much of the length of the conductor. The protective shield is a cylindricallyshaped …
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 March 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2014.
- 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.