James D Mumford

US Patent:

6737175, May 18, 2004

Filed:

Dec 7, 2001

Appl. No.:

10/017009

Inventors:

Trikur Anantharaman Ramanarayanan - Somerset NJ
Changmin Chun - Lawrenceville NJ
James Dirickson Mumford - Long Valley NJ

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

B32B 1520

US Classification:

428674, 148527, 148532, 148536, 148902, 422240, 422241, 428675, 428676, 428677, 428926

Abstract:

A method for inhibiting metal dusting corrosion of surfaces exposed to supersaturated carbon environments comprising constructing said surfaces of, or coating said surfaces with a copper based alloy. The invention is also directed to a composition resistant to metal dusting.

US Patent:

6942739, Sep 13, 2005

Filed:

Oct 26, 2001

Appl. No.:

10/002576

Inventors:

Changmin Chun - Lawrenceville NJ, US
Trikur Anantharaman Ramanarayanan - Somerset NJ, US
James Dirickson Mumford - Long Valley NJ, US
Adnan Ozekcin - Bethlehem PA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C23C008/22
C23C008/80

US Classification:

148225, 148233

Abstract:

The present invention is directed to a process for producing pearlite from an iron containing article comprising the steps of, (a) heating an iron containing article comprising at least 50 wt % iron for a time and at a temperature sufficient to convert at least a portion of said iron from a ferritic structure to an austenitic structure, (b) exposing said austenitic structure, for a time sufficient and at a temperature of about 727 to about 900 C. , to a carbon supersaturated environment to diffuse carbon into said austenitic structure and (c) cooling said iron containing article to form a continuous pearlite structure.

US Patent:

7422804, Sep 9, 2008

Filed:

Feb 1, 2005

Appl. No.:

11/048226

Inventors:

ChangMin Chun - Belle Mead NJ, US
James D. Mumford - Long Valley NJ, US
Trikur A. Ramanarayanan - Somerset NJ, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

B32B 9/00

US Classification:

428698

Abstract:

A metal dusting resistant composition comprises an alloy capable of forming a thermally stable titanium carbide coating on its surface when exposed to a carbon supersaturated environment and, a protective coating on the alloy surface comprising an outer oxide layer and an inner carbide layer between the alloy surface and the outer layer.

US Patent:

55207510, May 28, 1996

Filed:

Aug 23, 1994

Appl. No.:

8/294697

Inventors:

Vinod K. Pareek - Flemington NJ
Trikur A. Ramanarayanan - Somerset NJ
James D. Mumford - Long Valley NJ
Adnan Ozekcin - Bethlehem PA

Assignee:

Exxon Research and Engineering Company - Florham Park NJ

International Classification:

C23C 810

US Classification:

148286

Abstract:

The present invention is a process for forming protective films on an alloy substrate by: oxidizing an alloy comprising iron and chromium in an oxygen containing atmosphere, said alloy containing from about 5 to about 15 wt % chromium, at a temperature of from about 200. degree. C. (473. degree. K. ) to about 1400. degree. C. (1673. degree. K. ), more preferably 300. degree. C. (573. degree. K. ) to 600. degree. C. (873. degree. K. ) wherein the partial pressure of oxygen in said oxygen containing atmosphere is above or equal to the dissociation pressure of Fe. sub. 3 O. sub. 4 and FeO below or equal to the dissociation pressure of Fe. sub. 2 O. sub. 3 within the specified temperature range, and for a time sufficient to effect the formation of a film comprising iron-chromium oxide (FeCr. sub. 2 O. sub. 4) spinel on the surface of said alloy. In a further embodiment, the film may additionally contain Silicon.

US Patent:

54645239, Nov 7, 1995

Filed:

May 18, 1994

Appl. No.:

8/245341

Inventors:

Trikur A. Ramanarayanan - Somerset NJ
Vinod K. Pareek - Flemington NJ
James D. Mumford - Long Valley NJ
Horst Witzke - Flemington NJ

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

G01N 2726
G01N 27407

US Classification:

204424

Abstract:

A method and a sensor to measure the sulfur activity in sulfur-containing environments are disclosed. The active component is a non-stoichiometric metal sulfide foil or film. In the case of a thin sulfide film, a ceramic substrate is employed for improved mechanical rigidity. The electrical conductivity of the sulfide is related to the sulfur activity of the process stream to which it is exposed.