# US 12,110,467 B2 · Lubricating oil composition

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- Number: US 12,110,467 B2
- Document ID: US12110467B2
- Status: Granted
- Kind: B2
- Application number: 18/041,132
- Filed: 2021-09-06
- Published: 2023-08-17
- Granted: 2024-10-08
- Earliest claimed: 2020-09-08
- Assignees: Shell USA, Inc.
- Applicants: Shell Oil Company
- Inventors: Kengo Suzuki
- Web page: https://patentgrep.com/patent/US12110467B2

## CPC

- C10M 125/00: Lubricating compositions characterised by the additive being an inorganic material
- C10M 125/10: Metal oxides, hydroxides, carbonates or bicarbonates
- C10M 125/24: Compounds containing phosphorus, arsenic or antimony
- C10M 169/04: Mixtures of base-materials and additives
- C10M 2201/062: Oxides; Hydroxides; Carbonates or bicarbonates
- C10M 2201/085: Phosphorus oxides, acids or salts
- C10M 2203/003: used as base material
- C10M 2223/06: having phosphorus-to-carbon bonds
- C10N 2020/06: Particles of special shape or size
- C10N 2020/061: {Coated particles}
- C10N 2030/04: Detergent property or dispersant property
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

The invention provides a lubricating oil composition comprising: a base oil; and coated particles made of nanoparticles and phosphonic acid coating at least a portion of the surface of the nanoparticles.

## Claims

### Claim 1

A lubricating oil composition comprising: a base oil; and in the range of from 0.05 to 0.5% by mass of coated particles made of nanoparticles and phosphonic acid coating at least a portion of the surface of the nanoparticles, wherein the surface coverage of the coated particles by phosphonic acid is 10% or more, and wherein the nanoparticles are alumina.