Transparent epoxy structures
CA 2397570 C · Owner: Abb Power T & D Company Inc. · Inventors: Geibel, David M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cured filler-less epoxy compound formed as a rigid three-dimensional, transparent structure including a cylindrical sight bowl (10) of a utility or industrial high voltage bushing (15). A process for making a three-dimensional (e.g. cylindrical), transparent structure with improved strength including , the steps of obtaining a cured filler-less epoxy compound and then prestressing the filler-less epoxy compound.
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 January 12, 2001 and granted October 16, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2023.
- 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.