US 4,191,826 AGranted

Bispiperazido phosphorus acid esters

Assignees.a. Texaco Belgium n.v.

InventorJohny C. Hermans

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Compounds useful as lube oil additives are prepared by reaction of phosphorus halides and piperazine derivatives.

Dependent claims

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Dependencies are inferred from the claim text.

C08G 59/446
Amides: phosphoramides
C07F 9/650952
Six-membered rings: having the nitrogen atoms in the positions 1 and 4
C08K 5/5399
Phosphorus-containing compounds: phosphorus bound to nitrogen
C10M 137/16
Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus: having a…

From the US filing history. Foreign family members aren’t listed.

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