Lubricant for use in hot rolling of high chromium stainless steel
CA 2185679 C · Owner: Omosako, Kouji · Inventors: Omosako, Kouji; Hiramatsu, Akifumi; Yamada, Toshiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lubricant for use in hot rolling of high chromium stainless steel the lubricant being continuously supplied to surfaces of hot rolling rolls in contact with the steel being rolled at least during hot rolling of the stainless steel, which lubricant comprises a viscous aqueous solution of water soluble high molecular weight thickener and from 10 to 40 % by weight of iron hydroxide powder dispersed in the aqueous solution said, iron hydroxide powder having a median particle size of from not less than 0.1 µm to less than 1 µm and said lubricant having an apparent viscosity within the range of from 1,000 to 50,000 cP.
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 24, 1995 and granted July 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2017.
- 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.