Thomas F Weaver

US Patent:

59940522, Nov 30, 1999

Filed:

Mar 20, 1998

Appl. No.:

9/045595

Inventors:

Thomas D. Weaver - Rochester NY
David F. Jennings - Penfield NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 1498

US Classification:

430617

Abstract:

1. A thermographic imaging element comprising: (a) a support; and (b) an imaging layer comprising: (i) an oxidizing agent; (ii) a first reducing agent; and (iii) a second reducing agent comprising a boron compound containing at least one boron-hydrogen bond.

US Patent:

50048120, Apr 2, 1991

Filed:

Jan 22, 1990

Appl. No.:

7/479484

Inventors:

Thomas D. Weaver - Rochester NY

Assignee:

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

International Classification:

C07C40100

US Classification:

546201

Abstract:

Compounds as defined having a 1-phenylindole nucleus substituted in the 2-position with a 3-pyridyl group. Such compounds are useful in the preparation of cyanine dyes which can be used to sensitize silver halide emulsions for fogged direct-positive films.

US Patent:

59225289, Jul 13, 1999

Filed:

Mar 20, 1998

Appl. No.:

9/045406

Inventors:

Thomas D. Weaver - Rochester NY
David F. Jennings - Penfield NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 1498

US Classification:

430617

Abstract:

A thermographic imaging element comprising: (a) a support; and (b) an imaging layer comprising: (i) an oxidizing agent; (ii) a first reducing agent; and (iii) a second reducing agent comprising a silicon compound containing at least one silicon-hydrogen bond.

US Patent:

48392715, Jun 13, 1989

Filed:

Jun 26, 1987

Appl. No.:

7/066552

Inventors:

Thomas D. Weaver - Rochester NY

Assignee:

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

International Classification:

G03C 100
G03C 102

US Classification:

430596

Abstract:

A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e. g. , cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said cyanine dye is also covered. The dye useful in sensitizing the silver halide emulsion useful for fogged direct-positive films.

US Patent:

60550104, Apr 25, 2000

Filed:

Jun 26, 1998

Appl. No.:

9/105745

Inventors:

Thomas L. Rockwell - Rochester NY
Thomas C. Weaver - Sodus NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H04N 1053

US Classification:

347250

Abstract:

A printer for use in exposing a photosensitive material and method of operation thereof. The printer includes a rotatable polygon mirror having a plurality of adjacent facets. The mirror includes a reference facet and signal generator for generating a polygon index signal which defines a reference position. A light source for directing a light beam is provided for reflection of the beam off each of the adjacent facets for exposing the photosensitive material and defining a writing path. A sensor is also provided for generating a line start signal for each of the facets in response to the light beam passing over the sensor. The printer is provided with a switch for placing printer in a first set-up mode or writing mode. When in set-up mode a counter measures a first time period T. sub. S from the polygon index signal to a first line start signal generated by the reference facet.

US Patent:

49279335, May 22, 1990

Filed:

Jan 31, 1989

Appl. No.:

7/304574

Inventors:

Thomas D. Weaver - Rochester NY

Assignee:

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

International Classification:

C07D47104

US Classification:

546113

Abstract:

A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e. g. , cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said cyanine dye is also covered. The dye useful in sensitizing the silver halide emulsion useful for fogged direct-positive films.

US Patent:

61033510, Aug 15, 2000

Filed:

Mar 30, 1998

Appl. No.:

9/050722

Inventors:

Arunachalam T. Ram - Rochester NY
Joseph A. Manico - Rochester NY
Kathleen R. Gisser - Pittsford NY
Thomas D. Weaver - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

B32B 300
B32B 2714

US Classification:

428195

Abstract:

Time and temperature integrating devices for providing a visually observable indication of cumulative thermal exposure are disclosed comprising (a) a substrate having thereon a thermally sensitive image-forming area comprising a combination of (i) an organic silver salt oxidizing agent and (ii) a reducing agent for the organic silver salt oxidizing agent, and (b) indicating indicia in association with the image forming area for indicating when the device has been exposed to a predetermined cumulative thermal exposure. In accordance with further embodiments of the invention, a process of applying such a device to a perishable product, and a perishable product having such a device applied directly thereto or to packaging thereof, are also disclosed. Time-temperature indicators in accordance with the invention undergo readily detectable changes can be easily optimized to match various rates of time-temperature dependent cumulative changes desired to be monitored for various products.

US Patent:

51363127, Aug 4, 1992

Filed:

Aug 26, 1991

Appl. No.:

7/754242

Inventors:

Thomas C. Weaver - Sodus NY
Richard B. Wheeler - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03B 1503

US Classification:

354132

Abstract:

A flash system and method for providing artificial illumination for image capture wherein a source of flash illumination operates selectively in a first mode for projecting light in a first direction toward an indirect reflecting surface to illuminate a subject indirectly and in a second mode for projecting light in a second direction to illuminate the subject directly, electromagnetic radiation reflected directly from the indirect reflecting surface is sensed directly to provide a signal containing information about the indirect reflecting surface, and the information contained in the signal is utilized to control the selective projection of light in the first and second directions to control the quantities of indirect and direct light which illuminate the subject. In one aspect, electromagnetic radiation such as infrared radiation is transmitted to the indirect reflecting surface in a manner such that a portion of the radiation is reflected from the surface back to the flash system where it is detected to provide a signal containing information relating to the distance between the surface and a given location in the flash system. In another aspect, light reflected directly from the indirect reflecting surface during operation of the source in the first or indirect flash mode is received directly by a sensor in the system to provide a signal indicating the presence of the indirect reflecting surface.