Tracers and method of marking liquids
US-9506000-B2 · Nov 29, 2016 · US
US9587187B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9587187-B2 |
| Application number | US-201414782339-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 4, 2014 |
| Priority date | Apr 5, 2013 |
| Publication date | Mar 7, 2017 |
| Grant date | Mar 7, 2017 |
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A compound having formula (I) wherein R 1 and R 2 independently represent C 1 -C 6 alkyl; R 3 is C 1 -C 6 alkyl; R 4 is C 1 -C 18 alkyl or C 4 -C 18 heteroalkyl; m is zero, one, two or three; n is one, two or three; and j, k, p, q, r and s independently are zero, one or two; provided that at least one of j, k, p, q, r and s is not zero.
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The invention claimed is: 1. A compound having formula (I) wherein R 1 and R 2 independently represent C 1 -C 6 alkyl; R 3 is C 2 -C 6 alkyl; R 4 is C 1 -C 18 alkyl or C 4 -C 18 heteroalkyl; m is one or two; n is one, two or three; and j, k, p, q, r and s independently are zero, one or two; provided that at least one of j, k, p, q, r and s is not zero. 2. The compound of claim 1 in which n is one or two; m is one; j, p and r are zero or one; and k, q and s are zero. 3. The compound of claim 2 in which R 4 is C 2 -C 12 saturated alkyl. 4. The compound of claim 3 in which R 1 and R 2 independently represent C 1 -C 4 alkyl. 5. The compound of claim 4 in which R 3 is C 3 -C 6 alkyl. 6. The compound of claim 1 in which R 3 is C 3 -C 6 alkyl.
at least one hydroxy group bound to an aromatic carbon atom {(C10L1/1802, C10L1/1805, C10L1/1808, C10L1/1811, C10L1/1814, C10L1/1817, C10L1/1828 take precedence)} · CPC title
Tracers which serve to track or identify the fuel component or fuel composition · CPC title
containing oxygen · CPC title
the aromatic ring being a non-condensed ring · CPC title
Marking, e.g. coloration by addition of pigments · CPC title
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