Lubricant compositions containing ester-substituted hindered phenol antioxidants

US6559105B2 · kind B2 · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• William D. Abraham · Powell, US
• Paul E. Adams · Willoughby Hills, US
• Gordon Lamb · Derby, GB
• Thomas J. Wolak · Mentor, US
• Richard A. Denis · Parma Heights, US
• Jody A. Kocsis · Chagrin Falls, US
• James P. Roski · Euclid, US
• Virginia A. Carrick · Chardon, US
• Susan V. Cowling · Painesville, US

Key dates

• Filing date: Jan 16, 2001
• Grant date: May 6, 2003
• Expiry date: Mar 11, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C12Q2600/156
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A composition of an antioxidant of the formula where R3 is an alkyl group of 2 to 6 carbon atoms, and a dispersant or a detergent, is a useful additive package for lubricant compositions.