Method for manufacturing a pencil-shaped core
CA 2302623 C · Owner: Tempel Steel Company · Inventors: Latkow, Gary G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of making a pencil core having a plurality of substantially flat laminations wherein at least one lamination at the center of the core is wider than the, other laminations, a flat strip of core steel is fed into a progressive die and a plurality of, scrap region blanking stations is provided each of which blank out two spaced parallel, regions from the strip, but with each of the scrap region blanking stations blanking out the, regions at a different spacing. At an embossing station at least one , embossment is, provided in at least each of the laminations preceding the last lamination. After all of the, scrap region blanking stations a blanking and stacking station first …
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 28, 2000 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2022.
- 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.