Grease composition
CA 2000834 C · Owner: Imperial Chemical Industries Plc · Inventors: Tury, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition which comprises (a) a salt of monovalent metal (M) of a carboxylic acid in which the COOH group is attached to a ring atom of a fused ring system and (b) a grease which is a non-soap thickened oil which may be a mineral oil or a synthetic oil such as a silicone oil. The metal (M) may be sodium. The fused ring system is preferably a fused aromatic hydrocarbon ring system such as naphthalene and may include further substituents for example an -OH, group, in addition to the COOH group. If the acid contains both OH and COOH groups, these can be attached to adjacent atoms of the fused ring system. podium 2-naphthoate and sodium 3-hydroxy-2-alaphthoate have been found to be …
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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 October 17, 1989 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2011.
- 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.