Method for making packets of amorphous metal strip for transformer-core manufacture
CA 2048751 C · Owner: Freeman, David R. · Inventors: Freeman, David R.; Klappert, Willi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This method of making packets for transformer-core manufacture comprises: (i) providing a composite strip comprising many thin layers of amorphous steel strip (ii) advancing the leading end of the composite strip forward, (iii) cutting the composite strip at a location spaced rearwardly of the leading edge of the strip thereby detaching a first section of multi-layer strip and creating a new leading end just behind the cutting location, and (iv) then clamping the detached section to a supporting surface. Then the following steps (a) and (b) are carried out. (a) The new leading end of the composite strip is advanced forward, and the strip is cut at a location spaced rearwardly of the new …
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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 August 8, 1991 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2013.
- 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.