Curtis J Campbell

US Patent:

7956022, Jun 7, 2011

Filed:

Jul 29, 2005

Appl. No.:

11/192757

Inventors:

Jean-Louis Le Coent - Le Havre, FR
Jeffrey J. Toman - Oakland CA, US
Curtis B. Campbell - Hercules CA, US

Assignee:

Chevron Oronite Company LLC - San Ramon CA

International Classification:

C10M 159/20
C10M 135/02

US Classification:

508460, 508331, 508332, 508518, 508574

Abstract:

A process for preparing alkylhydroxybenzoate detergent-dispersant additives having low sulfur content and high TBN is described. The alkali metal alkylhydroxylbenzoate, alkaline earth metal alkylhydroxybenzoate and overbased alkaline earth metal alkylhydroxybenzoate reaction products described have a sulfur content in the range of from about 0. 1 to 1. 2 wt % are effective anti-corrosive detergent-dispersant additives in lubricating oil compositions.

US Patent:

20130165359, Jun 27, 2013

Filed:

Dec 27, 2012

Appl. No.:

13/727892

Inventors:

Andrew R. Gibbs - Pleasant Hill CA, US
Curtis Campbell - Hercules CA, US

Assignee:

Chevron Oronite Company LLC - San Ramon CA

International Classification:

C07C 307/00

US Classification:

508561, 564305

Abstract:

Disclosed herein is a post-treated salt of a sulfurized alkyl-substituted hydroxyaromatic composition which is a reaction product of (a) a salt of a sulfurized alkyl-substituted hydroxyaromatic composition, wherein the alkyl-substituted hydroxyaromatic compound is derived from alkylation of a hydroxyaromatic compound with one or more olefins comprising Cto Coligomers of monomers selected from propylene, butylene or mixtures thereof, (b) a source of an aldehyde and (c) a primary and/or secondary monoamine compound having at least one active hydrogen. The post-treated salt of a sulfurized alkylhydroxyaromatic composition disclosed herein has a reduced content of unsulfurized alkyl-substituted hydroxyaromatic compound and its unsulfurized metal salt as compared to the content, by combined mass, of the unsulfurized alkyl-substituted hydroxyaromatic compound and its unsulfurized metal salt present in the non-post-treated salt of a sulfurized alkyl-substituted hydroxyaromatic composition.

US Patent:

53306635, Jul 19, 1994

Filed:

Sep 2, 1992

Appl. No.:

7/938779

Inventors:

Robert H. Wollenberg - Orinda CA
Richard J. Nelson - Pinole CA
John McDonald - Emeryville CA
Susanne G. Ruelas - San Pablo CA
Curtis B. Campbell - Hercules CA
Kathryn E. Matera - Northford CT

Assignee:

Chevron Research and Technology Company - San Francisco CA

International Classification:

C10M15924
C10M13510

US Classification:

252 18

Abstract:

This invention is directed to neutral and low overbased alkylphenoxy sulfonates having a dialkyl content sufficient to provide an essentially neutral alkylphenoxy sulfonate having a viscosity no greater than about 1000 cSt at a temperature of 100. degree. C. in the presence of 40 weight percent diluent oil.

US Patent:

53306643, Jul 19, 1994

Filed:

Sep 2, 1992

Appl. No.:

7/939195

Inventors:

Robert H. Wollenberg - Orinda CA
Richard J. Nelson - Pinole CA
John McDonald - Emeryville CA
Susanne G. Ruelas - San Pablo CA
Curtis B. Campbell - Hercules CA
Kathryn E. Matera - Northford CT

Assignee:

Chevron Research and Technology Company - San Francisco CA

International Classification:

C10M13510
C10M15924

US Classification:

252 18

Abstract:

This invention is directed to neutral and low overbased alkylphenoxy sulfonates derived from alkylphenols prepared by alkylating phenol with an acidic alkylation catalyst having a Hammett (H. sub. o) acidity function of about -2. 3 or less (more negative).