Resistive current limiter and process for producing it
CA 2069681 C · Owner: Hoechst Aktiengesellschaft · Inventors: Bock, Joachim; Preisler, Eberhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A resistive current limiter takes the form of a hollow cylinder and is composed of high-temperature superconducting material. In this connection the high-, temperature superconducting material may be a polynary oxide. To produce said resistive current limiter a homogeneous, melt is prepared from an oxide mixture suitable for, forming high-temperature superconductors in a specified, stoichiometry and said melt is allowed to run at, temperatures above 900°C, into a casting zone which rotates about its horizontal axis. The molding solidified as a cylinder, is removed from the casting zone. The cylinder is sawn so as to produce a gap extending parallel to its axis. Furthermore a, multiplicity …
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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 May 27, 1992 and granted January 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 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.