New fluxing agents
CA 2325455 C · Owner: Seseke-Koyro, Ulrich · Inventors: Seseke-Koyro, Ulrich; Becker, Andreas; Frehse, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the invention components made of aluminium and aluminium alloys can be welded at temperatures of up to 600 ~C using a fluxing agent on the basis of alkali fluorozincate or alkali fluoride/zinc fluoride mixtures. Other fluxing agents, for example on the basis of potassium fluoroaluminate can be used in addition. Alkali fluorozincate fluxing agents especially potassium , and cesium fluorozincate fluxing agents act not only as a fluxing agent but , also improve the surface quality since zinc and alkali fluoroaluminates are deposited on the surface of the components. The invention also relates to new fluxing agents on the basis of alkali metal fluorozincates.
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 23, 1999 and granted May 17, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2021.
- 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.