Donald T Edwards

US Patent:

46221433, Nov 11, 1986

Filed:

Jul 2, 1985

Appl. No.:

6/751142

Inventors:

Donald W. Edwards - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 1301

US Classification:

2103211

Abstract:

A double-ended permeator. Permeate is extracted from both ends of a fiber bundle and discharged at one end only of a permeator.

US Patent:

51383268, Aug 11, 1992

Filed:

Jul 27, 1990

Appl. No.:

7/476405

Inventors:

Donald Edwards - Wilmington DE
Raymond Tietz - Wilmington DE
Dennis J. Kountz - Wilmington DE
Jeffrey D. Cohen - Wilmington DE
Alan G. A. M. Armstrong - Oxon, GB2
Ian L. McDougall - Oxon, GB2

Assignee:

Oxford Medical Limited - Oxford
E. I. Du Pont de Nemours & Company - Wilmington DE

International Classification:

G01V 300
H01F 100

US Classification:

324319

Abstract:

A magnetic field generating assembly including self-contained modules formed from relatively high temperature superconducting material. A magnetic flux guide, such as a yoke, is positioned relative to the modules so that magnetic flux generated by the modules is coupled into the flux guide.

US Patent:

50133314, May 7, 1991

Filed:

Jun 30, 1989

Appl. No.:

7/374203

Inventors:

Donald W. Edwards - Wilmington DE
Billy J. Etienne - Newark DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 5322
B01D 6304

US Classification:

55 16

Abstract:

A permeable membrane apparatus having one or more hollow-fiber bundles enclosed in a single housing with end caps adapted so as to segment the bundles into a plurality of portions that can be separately used for fluid separation and its use.

US Patent:

40991865, Jul 4, 1978

Filed:

Feb 25, 1977

Appl. No.:

5/771061

Inventors:

Donald William Edwards - Wilmington DE
Emery John Gorondy - Chadds Ford PA
Arend Van Roggen - Kennett Square PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

G03G 1900
G01D 1512

US Classification:

346 741

Abstract:

Magnetic printing process, and apparatus for carrying out same, comrpising: A. forming a magnetic image on a ferromagnetic material which is imposed on an electrically conductive support and subjecting the ferromagnetic material to the action of a charge dissipating means; B. developing the magnetic image by decorating same with a ferromagnetic toner comprising a ferromagnetic component, a dye and/or chemical treating agent and a water-soluble or water-solubilizable, preferably thermoplastic, resin which substantially encapsulates the ferromagnetic component and the dye and/or treating agent; C. transferring the developed image to a substrate; D. permanently fixing the dye and/or chemical treating agent of the image on the substrate; and E. removing the ferromagnetic component and the resin from the image on the substrate.

US Patent:

41174984, Sep 26, 1978

Filed:

Feb 25, 1977

Appl. No.:

5/771062

Inventors:

Donald William Edwards - Wilmington DE
Emery John Gorondy - Chadds Ford PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

G03G 1900
G01D 1512

US Classification:

346 741

Abstract:

Magnetic printing process, and apparatus for carrying out same, comprising: (a) forming a magnetic image on a ferromagnetic material which is imposed on an electrically conductive support; (b) developing the magnetic image by decorating same with a ferromagnetic toner comprising a ferromagnetic component, a dye and/or chemical treating agent and a water-soluble or water-solubilizable, preferably thermoplastic, resin which substantially encapsulates the ferromagnetic component and the dye and/or treating agent; (c) transferring the developed image to a substrate; (d) permanently fixing the dye and/or chemical treating agent of the image on the substrate; and (e) removing the ferromagnetic component and the resin from the image on the substrate.

US Patent:

42403740, Dec 23, 1980

Filed:

May 29, 1979

Appl. No.:

6/042942

Inventors:

Donald W. Edwards - Wilmington DE
Richard D. Kinard - Wilmington DE
Theodore J. Wirbisky - Avondale PA
Richard J. Angelucci - Glenolden PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

G03G 1309

US Classification:

118657

Abstract:

A magnetic image decorator is disclosed wherein two or more rotatable cylindrical magnetic augers disposed in a sump of magnetically attractable toner are used in conjunction with cooperating knife blades to decorate a surface containing a latent magnetic image and to distribute and redistribute toner particles to maintain a level sump.

US Patent:

41851307, Jan 22, 1980

Filed:

Apr 18, 1977

Appl. No.:

5/788668

Inventors:

Donald W. Edwards - Wilmington DE
Richard D. Kinard - Newark DE
Theodore J. Wirbisky - Wilmington DE
Richard J. Angelucci - Glenolden PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B05D 500
B05D 314

US Classification:

427 47

Abstract:

A magnetic image decorator is disclosed wherein two or more rotatable cylindrical magnetic augers disposed in a sump of magnetically attractable toner are used in conjunction with cooperating knife blades to decorate a surface containing a latent magnetic image and to distribute and redistribute toner particles to maintain a level sump.

US Patent:

51376318, Aug 11, 1992

Filed:

Oct 22, 1991

Appl. No.:

7/780348

Inventors:

Thomas J. Eckman - Hockessin DE
Donald W. Edwards - Wilmington DE
Presley P. Goodwyn - Wilmington DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 6304

US Classification:

2103218

Abstract:

A hollow-fiber membrane fluid-separation apparatus containing a plurality of hollow-fiber bundles is disclosed. The apparatus comprises a single-pressure container with a center chamber located in between facing ends of each bundle. The center chamber is in communication with an annular space around adjacent bundles and a discharge tube concentrically housed within a feed tube. The hollow-fiber membrane fluid separation apparatus is adapted for industrial performance with high volumetric efficiency and high solute rejection. A process for separation of fluids is also provided.