Patents by Inventor John F. Sawyer
John F. Sawyer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6551771Abstract: A multicolor negative image capture film element comprises multiple silver halide emulsion layers that together exhibit a more gradually sloped density to exposure relationship than is customary while providing a combination of improved latitude and desirable overexposure printing density reduction.Type: GrantFiled: June 18, 2002Date of Patent: April 22, 2003Inventors: John F. Sawyer, Sharon R. Lunt
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Patent number: 6447986Abstract: A multicolor negative image capture film element comprises multiple silver halide emulsion layers that together exhibit a more gradually sloped density to exposure relationship than is customary while providing a combination of improved latitude and desirable overexposure printing density reduction.Type: GrantFiled: June 27, 2001Date of Patent: September 10, 2002Assignee: Eastman Kodak CompanyInventors: John F. Sawyer, Sharon R. Lunt
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Publication number: 20020106592Abstract: Disclosed is a color photographic element comprising a multilayered blue light sensitive record, a multilayered green light sensitive record, and a multilayered red light sensitive record, the red record comprising two or more layers of differing light sensitivity, the most light sensitive layer of the red record containing a red light sensitized first emulsion having at least one wavelength of peak absorption, and at least one of the two most light sensitive layers of the red record containing a red sensitized second emulsion, wherein the first emulsion exhibits, as measured at 0.2 density units above Dmin, at least one wavelength of peak absorption that is longer than the shortest wavelength of peak absorption of the second emulsion. The element provides an advantageous combination of speed and color rendition.Type: ApplicationFiled: December 6, 2000Publication date: August 8, 2002Applicant: Eastman Kodak CompanyInventors: Sharon R. Lunt, John F. Sawyer, Mitchell M. Lin
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Patent number: 6423482Abstract: Disclosed is a color photographic element comprising a multilayered blue light sensitive record, a multilayered green light sensitive record, and a multilayered red light sensitive record, the red record comprising two or more layers of differing light sensitivity, the most light sensitive layer of the red record containing a red light sensitized first emulsion having at least one wavelength of peak absorption, and at least one of the two most light sensitive layers of the red record containing a red sensitized second emulsion, wherein the first emulsion exhibits, as measured at 0.2 density units above Dmin, at least one wavelength of peak absorption that is longer than the shortest wavelength of peak absorption of the second emulsion. The element provides an advantageous combination of speed and color rendition.Type: GrantFiled: December 6, 2000Date of Patent: July 23, 2002Assignee: Eastman Kodak CompanyInventors: Sharon R. Lunt, John F. Sawyer, Mitchell M. Lin
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Publication number: 20020055072Abstract: A multicolor negative image capture film element comprises multiple silver halide emulsion layers that together exhibit a more gradually sloped density to exposure relationship than is customary while providing a combination of improved latitude and desirable overexposure printing density reduction.Type: ApplicationFiled: June 27, 2001Publication date: May 9, 2002Inventors: John F. Sawyer, Sharon R. Lunt
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Patent number: 6316174Abstract: A multicolor negative image capture film element comprises multiple silver halide emulsion layers that together exhibit a more gradually sloped density to exposure relationship than is customary while providing a combination of improved latitude and desirable overexposure printing density reduction.Type: GrantFiled: August 24, 2000Date of Patent: November 13, 2001Assignee: Eastman Kodak CompanyInventors: John F. Sawyer, Sharon R. Lunt
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Patent number: 6180330Abstract: An imaging element comprising a reflective base and at least one gelatin containing layer said at least one layer comprising a dispersion of solid particle pigments of a particle size less than 1.0 micrometer.Type: GrantFiled: August 10, 1999Date of Patent: January 30, 2001Assignee: Eastman Kodak CompanyInventors: Thaddeus S. Gula, Robert P. Bourdelais, John F. Sawyer, Mary Christine Brick
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Patent number: 6114102Abstract: This invention provides an imaging element comprising paper and a biaxially oriented polyolefin sheet adhered to the upper side of said paper, wherein between the paper and the upper surface layer of said biaxially oriented polyolefin sheet, there is located at least one oxygen barrier layer having less than 8.0 cc/m.sup.2. hr. atm. oxygen transmission rate.Type: GrantFiled: October 26, 1998Date of Patent: September 5, 2000Assignee: Eastman Kodak CompanyInventors: Peter T. Aylward, Ann P. Newberry, John F. Sawyer, Dennis E. McGee, Lyle J. Harley
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Patent number: 6030742Abstract: The invention relates to a photographic element comprising at least one photosensitive silver halide layer comprising at least one dye forming coupler, a support comprising paper having laminated thereto a top and bottom sheet comprising biaxially oriented polyolefin sheets, wherein said photographic element has a surface roughness of between 0.15 and 0.50 mm and an average stiffness of between 150 and 300 millinewtons, a stiffness ratio between machine direction and cross direction of between 0.8 and 1.2 at between 20 and 70% humidity, a maximum curl value of 10 curl units, said photographic element has a back roughness of between 0.30 and 2.00 mm, and has a tear strength of between 300 and 900 N.Type: GrantFiled: November 23, 1998Date of Patent: February 29, 2000Assignee: Eastman Kodak CompanyInventors: Robert P. Bourdelais, Thaddeus S. Gula, Peter T. Aylward, Sandra J. Dagan, John F. Sawyer, Geoffrey Mruk
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Patent number: 5932403Abstract: A color negative photographic element is disclosed comprising at least one light-sensitive image dye-forming unit containing a plural number of silver halide emulsion layers having different levels of photographic sensitivity which are spectrally sensitized to the same color region, wherein the silver halide emulsion layer having the highest level of photographic sensitivity of the unit comprises at least 40 wt %, with respect to total silver halide in the layer, of a first silver halide emulsion comprising silver halide grains with an average equivalent circular diameter represented by ECD.sub.1 and from 5 to 35 wt % of a second silver halide emulsion comprising silver halide grains with an average equivalent circular diameter represented by ECD.sub.2, and the silver halide emulsion layer having the second highest level of photographic sensitivity comprises at least 40 wt % of a third silver halide emulsion having an average equivalent circular diameter represented by ECD.sub.3, where the ratio of ECD.sub.Type: GrantFiled: March 5, 1998Date of Patent: August 3, 1999Assignee: Eastman Kodak CompanyInventors: Steven J. Powell, John F. Sawyer
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Patent number: 5561012Abstract: Color negative photographic films having red, green and blue color sensitive records, wherein the ratio of the toe area contrast to the mid-scale contrast for each of the red, green and blue color records is less than or equal to 0.80, and either at least two color records having a toe-area contrast less than or equal to 0.42 or a mid-scale contrast less than or equal to 0.55, or the film having a speed rating of ISO 200 or greater. The mid-scale contrast for a color record is defined as the slope of a straight line connecting a point C and and a point D on the characteristic curve of Status M density versus log Exposure for the color record, where points C and D are located by defining a point A on the characteristic curve at a density level 0.1 above minimum density, a point B is located on the characteristic curve at an exposure value +1.0 Log Exposure beyond point A, and points C and D are located at exposure values -0.45 log Exposure and +0.45 log Exposure with respect to point B, respectively.Type: GrantFiled: December 5, 1994Date of Patent: October 1, 1996Assignee: Eastman Kodak CompanyInventors: John C. Brewer, John T. Keech, John F. Sawyer
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Patent number: 5399468Abstract: A color photographic silver halide negative working duplicating element and process comprising (A) a magenta colored masking coupler in at least one blue-sensitive photographic silver halide emulsion layer; and (B) a combination of (i) masking couplers and (ii) color contamination of at least one photographic silver halide emulsion layer enables upon exposure and processing of the element formation of a duplicate image that enables formation of a print image that is visually indistinguishable from the original image. The color photographic silver halide duplicating element is useful in forming duplicate images, especially for color motion picture films.Type: GrantFiled: August 17, 1993Date of Patent: March 21, 1995Assignee: Eastman Kodak CompanyInventors: John F. Sawyer, David E. Fenton
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Patent number: 5380628Abstract: Fine particle photographic coupler dispersions are prepared by forming a dispersion of a photographic coupler, coupler solvent and auxiliary coupler solvent in an aqueous gelatin medium containing at least about 1% by weight of an anionic surfactant selected from the group consisting of alkali metal salts of alkarylene sulfonic acids, alkali metal salts of alkyl sulfates, alkaryl sulfonate salts, and alkyl sulfosuccinates; and washing the dispersion with water for a time sufficient to remove at least one-fourth of the surfactant.Type: GrantFiled: July 29, 1991Date of Patent: January 10, 1995Assignee: Eastman Kodak CompanyInventors: John F. Sawyer, Paul L. Zengerle
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Patent number: 5283164Abstract: A color photographic silver halide negative working duplicating element comprising a support bearing, in order from the support, at least one red-sensitive photographic silver halide emulsion layer package comprising at least one cyan image-dye forming coupler that is capable upon exposure and processing of forming a cyan image dye that absorbs in the range of the original image; at least one green-sensitive photographic silver halide emulsion layer package comprising at least one magenta image-dye forming coupler that is capable, upon exposure and processing, of forming a magenta image dye that absorbs in the range of the original image; and at least one blue-sensitive photographic silver halide emulsion layer package comprising at least one yellow image-dye forming coupler that is capable upon exposure and processing of forming a yellow image dye that absorbs in the range of the original image.Type: GrantFiled: June 19, 1992Date of Patent: February 1, 1994Assignee: Eastman Kodak CompanyInventors: David E. Fenton, John F. Sawyer, Donald H. Hunger
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Patent number: 5190851Abstract: A color photographic silver halide negative working duplicating element comprising a support having thereon at least one red-sensitive photographic silver halide emulsion layer comprising at least one cyan image-dye forming coupler; at least one green-sensitive photographic silver halide emulsion layer comprising at least one magenta image-dye forming coupler; and, at least one blue-sensitive photographic silver halide emulsion layer comprising at least one yellow image-dye forming coupler, provides improved images when (a) at least one of the layers comprises a unit of at least two layers including a first layer and a second layer, the first layer having a higher photosensitivity than the second layers and being farther from the support than the second layers; (b) the first layers contain an image-dye forming coupler in an amount insufficient to react with all the oxidized developer formed during development after maximum exposure; (c) the image-dye forming couplers of the first layers being in a dispersionType: GrantFiled: December 21, 1990Date of Patent: March 2, 1993Assignee: Eastman Kodak CompanyInventors: Krishnan Chari, John T. Keech, John F. Sawyer, Jeffrey W. Schmoeger, Paul L. Zengerle