William John Nebe

US Patent:

RE39106, May 23, 2006

Filed:

Jan 11, 2000

Appl. No.:

09/481654

Inventors:

John A. Lawton - Landenberg PA, US
William J. Nebe - Wilmington DE, US
Glen A. Thommes - Wilmington DE, US
Jonathan V. Caspar - Greenville DE, US

Assignee:

DSM IP Assets B.V. - Heerlen

International Classification:

G03F 7/028
G03F 7/26

US Classification:

4302801, 522144, 522142, 522 2, 522170, 264401, 430945, 430 18, 430269, 525482

Abstract:

A photohardenable composition especially suitable for use in solid imaging. The compositions are characterized by their improved photospeed in combined with excellent initial green strength. The compositions allows for the production of articles by solid imaging processing techniques that show little or no distortion, high accuracy, excellent clarity. The compositions are low in toxicity and have low sensitivity to water.

US Patent:

42763665, Jun 30, 1981

Filed:

Jul 14, 1980

Appl. No.:

6/168153

Inventors:

Peter J. McCartin - Princeton Junction NJ
William J. Nebe - Wilmington DE

Assignee:

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

International Classification:

G03C 500

US Classification:

430291

Abstract:

Photoactive, thermally coalescible resin plastisol dispersions comprising a polyvinyl chloride polymer having attached to the polymer backbone photopolymerizable or photocrosslinkable groups dispersed in a liquid plasticizer medium, and a photoinitiator which is either a separate component or a photoactive substituent present on the polymer backbone. The photoactive plastisols, in element form, can be used in an image formation process that is a positive working washout or negative toned imaging system.

US Patent:

40090400, Feb 22, 1977

Filed:

May 21, 1975

Appl. No.:

5/579601

Inventors:

William John Nebe - Wilmington DE

Assignee:

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

International Classification:

G03C 168
C08F 246

US Classification:

96115R

Abstract:

Polymers containing hexaarylbiimidazole groups depolymerize upon being struck by radiation and are useful in producing positive images. Exemplary is poly[1,10-bis-4'-[5"(2-o-chlorophenyl-4"-phenyl)imidazolyl]phenoxydecane].

US Patent:

49120190, Mar 27, 1990

Filed:

May 31, 1988

Appl. No.:

7/200401

Inventors:

William J. Nebe - Wilmington DE
James J. Osborne - Kennett Square PA

Assignee:

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

International Classification:

G03C 168

US Classification:

430281

Abstract:

A photosensitive ceramic coating composition which is fireable in a substantially nonoxidizing atmosphere comprising an admixture of: (a) finely divided particles of ceramic solids having a surface area-to-weight ration of no more than 10 m. sup. 2 /g and at least 80 wt. % of the particles having a size of 1-10. mu. m, and (b) finely divided particles of an inorganic biner having a glass transition temperature in the range from of 550. degree. to 825. degree. C. , a surface area-to-weight ration of no more than 10 m. sup. 2 /g and at least 90 wt. % of the particles having a size of 1-10. mu. m, the weight ratio of (b) to (a) being in a range from 0. 6 to 2, dispersed in an organic medium comprising (c) an organic polymeric binder, and (d) a photoinitiation system, dissolved in (e) photohardenable monomer, and (f) an organic medium wherein the improvement comprises an organic polymeric binder containing a copolymer or interpolymer of a C. sub. 1 -C. sub. 10 alkyl acrylate, C. sub. 1 -C. sub. 10 methacrylate, styrene, substituted styrene or combinations thereof and an ethylenically unsaturated carboxylic acid, wherein a moiety in the binder derived from the unsaturated carboxylic acid comprises at least 15 weight percent of the polymer and wherein the binder has a molecular weight not greater than 50,000 and wherein the composition upon imagewise exposure to actinic radiation is developable in an aqueous solution containing 1 percent by weight sodium carbonate.

US Patent:

40295052, Jun 14, 1977

Filed:

May 20, 1976

Appl. No.:

5/688479

Inventors:

William John Nebe - Wilmington DE

Assignee:

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

International Classification:

G03C 500
G03C 504
G03C 168

US Classification:

96 351

Abstract:

Positive polymer images are produced on substrates having applied thereto a layer of photopolymerizable composition containing (1) a non-gaseous ethylenically unsaturated compound capable of polymerization by free-radical initiated chain propagation, (2) a dinitroso compound which is a noninhibitor of free-radical polymerization and is photochemically converted by ultraviolet radiation to an inhibitor of free-radical polymerization, and (3) a photoactivatable organic free-radical generating system. These images are produced by imagewise exposing a portion of the photopolymerizable layer through a transparency bearing an opaque image to ultraviolet radiation that converts the dinitroso compound to an inhibitor of free-radical polymerization, exposing a greater portion of the photopolymerizable layer, including the area exposed to the imagewise exposure radiation, to actinic radiation that activates the free-radical generating system but does not convert the dinitroso compound to an inhibitor of free-radical polymerization, whereby a positive polymeric image is formed in the areas not exposed to the imagewise exposure radiation.

US Patent:

50324780, Jul 16, 1991

Filed:

Aug 21, 1989

Appl. No.:

7/397159

Inventors:

William J. Nebe - Wilmington DE
James J. Osborne - Kennett Square PA

Assignee:

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

International Classification:

G03F 7027
G03F 7033

US Classification:

430281

Abstract:

A photosensitive aqueous developable photosensitive gold conductive composition is disclosed which is fireable in a nonoxidizing atmosphere is developable in an aqueous solution containing 0. 8 percent by weight sodium carbonate.

US Patent:

46364536, Jan 13, 1987

Filed:

Oct 1, 1985

Appl. No.:

6/782424

Inventors:

Dalen E. Keys - Wilmington DE
William J. Nebe - Wilmington DE

Assignee:

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

International Classification:

G03C 168
G03F 716

US Classification:

430138

Abstract:

Photopolymerizable elements comprising a support, a layer of a photopolymerizable composition and a protective layer, the photopolymerizable layer having in reactive association therewith, e. g. , dispersed therein or in contact with the surface, pressure rupturable microcapsules containing therein at least one active component for the photopolymerizable composition, e. g. , ethylenically unsaturated compound, sensitizer, photoinitiator, oxygen scavenger, and plasticizer. Processes for the preparation of an activated photopolymerizable element and use are described wherein the microcapsules are ruptured, i. e. , prior to imagewise exposure and development. The photopolymerizable elements are useful as color proofs, printing plates, etc.

US Patent:

51678691, Dec 1, 1992

Filed:

Oct 23, 1991

Appl. No.:

7/780828

Inventors:

William J. Nebe - Wilmington DE
James J. Osborne - Kennett Square PA

Assignee:

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

International Classification:

H01B 102

US Classification:

252514

Abstract:

A gold conductor composition comprising by weight, basis total inorganic solids, finely divided particles of 75-95% metallic gold at least 90% by weight of which gold particle have an aspect ratio of no greater than 2, 0. 5-10% cadmium borosilicate glass, 0. 1-5% spinel-forming divalent metal oxide selected from the group consisting of CuO, ZnO, MgO, CoO, NiO, FeO, MnO and mixtures thereof, and 0. 1-1. 0% metal selected from the group consisting of palladium, platinum and rhodium, all of the foregoing particles being dispersed in an organic medium. This composition is useful in electronic packaging for forming conductor patterns on ceramic-based substrates, particularly patterns on which metallic components are bonded by brazing.