Flux containing wire for use in stainless steel welding
CA 2022748 C · Owner: Nishikawa, Yutaka · Inventors: Kurokawa, Tsuyoshi; Ogawa, Tsuneshi; Nishikawa, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described herein is a flux cored wire for use in stainless steel welding, the wire having a flux filled in a stainless steel sheath the, flux containing, on the basis of the total weight of the wire 4.7-8.5% of, TiO2, 0.5-3.5% of Al2O3 and 0.6-3.0% of SiO2 and/or ZrO2 in proportions satisfying the following formula, TiO2 > Al2O3 + SiO2 + ZrO2 and further 0.02-0.25% of metal fluoride (in terms of F conversion value) and 0.1-1.0% of Ti. Desirably, the flux contains slag-forming components in a restricted range of 8.5-13.5% and in proportions satisfying the following formula, Al2O3 + SiO2 + ZrO2 ~ 5.0%.
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 August 7, 1990 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2012.
- 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.