Sulfur-containing compounds as antioxidants for lubricants and elastomers
CA 1294275 C · Owner: Ciba-Geigy Ag · Inventors: Evans, Samuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sulfur-containing compounds as antioxidants for lubricants and elastomers Abstract, Compounds of the formula (I) (I), in which the R5 independently of one another are H phenyl, naphthyl or, C7-C30alkaryl and R1 is H C1-C8alkyl, C7-C9aralkyl, C5-C12cycloalkyl phenyl, naphthyl, C7-C30alkaryl or a group of the formula (II) -(CH2)a-SR3 (II), R2 is C7-C30alkaryl, phenyl naphthyl or phenyl containing, in the paraposition, an HO or C1-C18alkoxy group or a group of the formulae or , or , or R1 and R2, together with the nitrogen atom to which they are attached are a radical of the formula (III), (III) R3 is a radical of the formulae -(CH2)b-COOR6 or -(CH2)2OCOR7 a is, the number 1, 2 or 3 and b is …
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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
- Granted January 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 2009.
- 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.