Marking powder for and method of marking a metallic article
CA 2107259 A1 · Owner: Hoogovens Groep Bv · Inventors: Paramanathan, Bala Kumaran; Korver, Johannes Cornelis; De Muijnck, Andries Cornelis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A marking powder is disclosed for marking metallic bodies, in particular hot metallic bodies which, may be steel or other ferrous metal. Zinc is present in the marking powder in an amount 20 to 70% by weight and, it found that this results in improved legibility which, lasts for longer. The powder may be prepared by adding zinc powder to a known aluminium-based marking powder in an appropriate ratio. Coarse zinc powder was found to be better.
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 September 29, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2015.
- 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.