Sheet metal layered with phosphate ester and lubricant
CA 2508716 C · Owner: Castrol Industrie Gmbh · Inventors: Wormuth, Reinhard; Liese, Dirk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to sheet metal or a sheet metal blank provided with a lubricant , coating, especially an anti-corrosion oil of the Pre-Lube or Dry Lube variety. The sheet , metal or sheet metal blank comprises a layer which is formed by applying a solution , containing an organic phosphoric acid ester to the metal surface of the sheet metal. Sheet , metal provided with said coating has excellent tribological properties.
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 December 2, 2003 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2025.
- 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.