Patents by Inventor John W. Harder
John W. Harder 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).
-
Patent number: 6096493Abstract: Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a certain magenta dye forming coupler and a light-sensitive silver halide emulsion layer having associated therewith a certain yellow dye-forming coupler. The element exhibits improved dye fade and equal or better red color gamut than that obtained using comparisons.Type: GrantFiled: August 14, 1998Date of Patent: August 1, 2000Assignee: Eastman Kodak CompanyInventors: Leslie Shuttleworth, Rakesh Jain, John W. Harder
-
Patent number: 6037113Abstract: Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer having in association therewith at least one dye- forming coupler of Formula (1a): ##STR1## wherein: R.sub.1 is an alpha-branched alkyl group with greater than 10 carbon atoms;R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are each independently a hydrogen atom or a substituent;Z is a hydrogen atom or a group which can be split off by the reaction of the coupler with an oxidized color developing agent.The element exhibits improved dye light stability.Type: GrantFiled: August 14, 1998Date of Patent: March 14, 2000Assignee: Eastman Kodak CompanyInventors: Leslie Shuttleworth, Rakesh Jain, John W. Harder
-
Patent number: 5994048Abstract: Disclosed is a photographic element comprising a support on which is coated at least one green-sensitized silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler of Formula I ##STR1## wherein: R.sub.1 is an alkyl group;R.sub.5, R.sub.6, R.sub.7, and R.sub.8 each independently represent a hydrogen atom or a substituent; and ##STR2## in which i, B, and J are independently hydrogen, alkyl or aryl substituent groups that together comprise at least two hydroxyl groups. The element provides improved resistance to yellowing.Type: GrantFiled: August 14, 1998Date of Patent: November 30, 1999Assignee: Eastman Kodak CompanyInventors: John W. Harder, Leslie Shuttleworth, Rakesh Jain
-
Patent number: 5976777Abstract: A photographic element comprises a light-sensitive silver halide emulsion layer having associated therewith a 4-H-pyrazolo-[1,5-a] benzimidazole coupler bearing in the 2-position an alkoxy substituent containing a substituent comprising at least 3 fused carbocyclic rings.Type: GrantFiled: August 14, 1998Date of Patent: November 2, 1999Assignee: Eastman Kodak CompanyInventors: John W. Harder, Stanley W. Cowan, Rakesh Jain
-
Patent number: 5925503Abstract: The invention provides a photographic element comprising a silver halide emulsion layer having associated therewith a dye-forming coupler represented by formula I: ##STR1## wherein X is hydrogen or a coupling-off group; andR' is a tertiary alkyl group and R" represents the group ##STR2## in which R.sup.1, R.sup.2, and R.sup.3 are independently selected alkyl groups, provided that any two of R.sup.1, R.sup.2, and R.sup.3 may join to form a ring;R.sup.4 is hydrogen or a substituent, provided that R.sup.3 and R.sup.4 may join to form a ring when R.sup.4 is a substituent; andW is a substituent selected from the group consisting of --C(O)R.sup.5, --SO.sub.2 R.sup.5, and --P(O)(OR.sup.6).sub.2 in which R.sup.5 is selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, alkylamino, and arylamino groups and R.sup.6 is selected from the group consisting of alkyl and aryl groups.The element exhibits improved magenta dye light stability.Type: GrantFiled: January 15, 1997Date of Patent: July 20, 1999Assignee: Eastman Kodak CompanyInventors: John W. Harder, Paul A. Burns, Paul P. Spara
-
Patent number: 5629140Abstract: An improved photographic element comprises a support bearing at least one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent. The hydrazide compound includes an electron-withdrawing and aqueous-solubilizing group on an aromatic ring linked to the carbonyl of the hydrazide group and a ballasting group on an aromatic ring linked to a nitrogen atom of the hydrazide group. Preferably, the hydrazide compound is incorporated in a photographic element which comprises a four-equivalent 5-pyrazolone magenta-dye-forming coupler.Type: GrantFiled: January 17, 1995Date of Patent: May 13, 1997Assignee: Eastman Kodak CompanyInventors: John W. Harder, John V. Nelson, Stephen P. Singer
-
Patent number: 5543277Abstract: An improved photographic element comprises a support bearing at least-one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent. The hydrazide compound comprises at least one polyhydroxy aromatic nucleus or a precursor thereof and at least one moiety containing an ##STR1## group which is bonded to a ring carbon atom of the polyhydroxy aromatic nucleus or precursor thereof through a linking group. The linking group can be an oxy, thio, sulfinyl, sulfonyl or alkylene group or it can be a carbonyl group when the polyhydroxy aromatic nucleus comprises at least three hydroxyl groups.Type: GrantFiled: March 1, 1995Date of Patent: August 6, 1996Assignee: Eastman Kodak CompanyInventors: Stephen P. Singer, John W. Harder
-
Patent number: 5534401Abstract: There are described reversal photographic elements containing magenta dye-forming couplers that yield dye images that particularly lend themselves to retouching. The photographic element comprises a pyrazoloazole magenta dye forming coupler having a cleavable ballast group joined to the remainder of the molecule by one or two electrophilic cleavage groups which can be removed with a specialized processing composition after reversal processing.Type: GrantFiled: March 1, 1995Date of Patent: July 9, 1996Assignee: Eastman Kodak CompanyInventors: J. R. Vargas, John W. Harder, Phillip D. Knight, Paul A. Burns, Lynda D. Weber
-
Patent number: 5413905Abstract: The present invention relates to water soluble photographic sensitivity increasing alkynylamine compounds. It also relates to photographic elements containing such compounds.Type: GrantFiled: December 16, 1993Date of Patent: May 9, 1995Assignee: Eastman Kodak CompanyInventors: Roger Lok, Carl R. Preddy, John W. Harder
-
Patent number: 5411839Abstract: An improved color reversal element comprising: a support having thereon at least two light-sensitive silver halide emulsion layers and a compound capable of releasing a development inhibitor, the element comprising a compound having the structural formulaCAR--(TIME).sub.n --INHwherein:CAR is a carrier moiety from which --(TIME).sub.n --INH is released during color development;TIME is a timing group; INH is comprised of a development inhibitor moiety selected from the group consisting of oxazole, thiazole, diazole, oxathiazole, triazole, thiatriazole, benzotriazole, tetrazole, benzimidazole, indazole, isoindazole, mercaptotriazole, mercaptothiadiazole, mercaptotetrazole, selenotetrazole, mercaptothiazole, selenobenzothiazole, mercaptobenzoxazole, selenobenzoxazole, mercaptobenzimidazole, mercaptobenzothiazole, selenobenzimidazole, benzodiazole, mercaptooxadiazole, or benzisodiazole, the INH havina an inhibitor strength greater than 1 (one), andn is 0, 1 or 2.Type: GrantFiled: January 15, 1993Date of Patent: May 2, 1995Assignee: Eastman Kodak CompanyInventors: John W. Harder, Paul A. Burns, J. Ramon Vargas, Arlyce T. Bowne, Philip D. Knight, William J. Begley, Hans G. Ling
-
Patent number: 5380633Abstract: An improved color reversal element is disclosed capable of development in black and white developer, and of development in a color developer comprising:a support having thereon at least two light-sensitive silver halide emulsion layers and a combination of compounds (A) and (B)Compound (A) capable of releasing a development modifier having the structural formulaM(Time).sub.n --INH(1)whereinM is a carrier, moiety from which --(Time).sub.n --INH(1) is released during black and white development to provide a weak inhibitor;Compound (B) having the structural formulaCAR--(TIME).sub.n --INH(2)wherein:CAR is a carrier moiety from which --(TIME).sub.n --INH(2) is released during color development to provide a strong inhibitor.Type: GrantFiled: January 15, 1993Date of Patent: January 10, 1995Assignee: Eastman Kodak CompanyInventors: John W. Harder, John D. Baloga
-
Patent number: 5344753Abstract: A dry analytical element has been prepared for the assay of leucine aminopeptidase at a pH of 6.5 to 11. The element zone contains an aromatic substrate for the enzyme. This substrate provides an aromatic reactant which has a primary amino group on the aromatic ring in the ortho or para position to an electron donor group. The aromatic reactant is oxidized with an oxidizing compound (such as an oxidase) and the oxidized compound reacts with a ballasted color-forming coupler to provide a dye.Type: GrantFiled: June 1, 1992Date of Patent: September 6, 1994Assignee: Eastman Kodak CompanyInventors: John C. Mauck, Harold C. Warren, III, John W. Harder
-
Patent number: 5296337Abstract: There are described a method for retouching photographic images, compositions adapted for such retouching, and photographic elements containing dye-forming couplers that yield dye images that particularly lend themselves to retouching by this method. The method comprises contacting a photographic element containing a dye image with a defined retouching composition to solubilize and remove selected areas or amounts of dye. The composition comprises an aqueous basic solution of a dinucleophile and a water-soluble organic co-solvent. The preferred photographic element for application of this retouching method comprises a dye image formed from a pyrazoloazole magenta dye forming coupler having a cleavable ballast group joined to the remainder of the molecule by one or two electrophilic cleavage groups. The retouching composition cleaves the ballast from the dye and solubilizes the dye, allowing it to be washed from the element.Type: GrantFiled: April 23, 1992Date of Patent: March 22, 1994Assignee: Eastman Kodak CompanyInventors: J. Ramon Vargas, John W. Harder, Phillip D. Knight, Paul A. Burns, Lynda D. Weber
-
Patent number: 5283340Abstract: A photographic naphtholic coupler comprising a ballast free naphtholic coupler moiety containing a --CONH.sub.2 group in the 2- position and a ballasted coupling-off group in the 4- position enables good wash out of dye formed upon oxidative coupling from a photographic material during processing of such a photographic material. Such a naphtholic coupler is useful in photographic silver halide materials and processes.Type: GrantFiled: June 4, 1992Date of Patent: February 1, 1994Assignee: Eastman Kodak CompanyInventors: William J. Begley, Teh-hsuan Chen, Hans G. Ling, John W. Harder, Arlyce T. Bowne
-
Patent number: 5158865Abstract: Novel photographic filter dyes are immobile as incorporated in a photographic element, but during processing, are uniformly converted to a form which is removable from the element. 2 The filter dye is represented by the structure:DYE--LS--BALwhere:BAL is a ballast group;DYE is a filter dye moiety;LS is a splittable linking group attached to a position in DYE that is not in conjugation with the dye chromophore.Type: GrantFiled: December 20, 1990Date of Patent: October 27, 1992Assignee: Eastman Kodak CompanyInventors: John W. Harder, Peter R. Seoane, Michael P. Youngblood
-
Patent number: 5151343Abstract: A photographic naphtholic coupler comprising a ballast free naphtholic coupler moiety containing a --CONH.sub.2 group in the 2- position and a ballasted coupling-off group in the 4- position enables good wash out of dye formed upon oxidative coupling from a photographic material during processing of such a photographic material. Such a naphtholic coupler is useful in photographic silver halide materials and processes.Type: GrantFiled: August 22, 1991Date of Patent: September 29, 1992Assignee: Eastman Kodak CompanyInventors: William J. Begley, Teh-hsuan Chen, Hans G. Ling, John W. Harder, Arlyce T. Bowne
-
Patent number: 5118594Abstract: This invention relates to novel photographic dye-forming coupler compounds which are non-diffusible as incorporated in a photographic element, but which, during processing, are converted to a form which is removable from the element if the coupler compound has not reacted with oxidized silver halide color developing agent.Type: GrantFiled: April 29, 1991Date of Patent: June 2, 1992Assignee: Eastman Kodak CompanyInventors: Gregory J. Lestina, Jon D. Bass, John W. Harder, Stephen P. Singer
-
Patent number: 5110942Abstract: A method of retouching a dye image comprises selective removal with an aqueous acidic organic solvent solution, as described in the application, of a portion of a dye image from an exposed and processed photographic silver halide element comprising a support bearing a dye image from a dye-forming coupler and a primary amine photographic color developing agent, wherein the dye-forming coupler: (a) contains so ionizable group that is retained as part of a dye formed upon oxidative coupling, (b) has a structure such that the Log P of the coupler is greater than 4 and is derived from a four-equivalent coupler that has a Log P less than 8, and (c) has a coupling reactivity that enables formation of maximum image density of at least 0.6. The method comprises the step of contacting the dye image with an aqueous acidic organic solvent solution, as described in the application, for a time and at a temperature sufficient to selectively dissolve and remove a portion of the dye image from the photographic element.Type: GrantFiled: August 31, 1990Date of Patent: May 5, 1992Assignee: Eastman Kodak CompanyInventors: John W. Harder, Paul A. Burns
-
Patent number: 5051343Abstract: This invention relates to novel photographic dye-forming coupler compounds which are non-diffusible as incorporated in a photographic element, but which, during processing, are converted to a form which is removable from the element if the coupler compound has not reacted with oxidized silver halide color developing agent.Type: GrantFiled: June 16, 1989Date of Patent: September 24, 1991Assignee: Eastman Kodak CompanyInventors: Gregory J. Lestina, Jon D. Bass, John W. Harder, Stephen P. Singer
-
Patent number: 5021325Abstract: A pyrazolotriazole dye-forming coupler containing on a carbon atom in a non-coupling position a ballast group derived from and bonded through a carboxylic acid portion of an unsubstituted or substituted amino acid provides useful magenta dye images in a photographic material and process and enables simplification of manufacture of the coupler. Such couplers are useful in photographic silver halide materials and processes.Type: GrantFiled: December 19, 1989Date of Patent: June 4, 1991Assignee: Eastman Kodak CompanyInventors: Paul A. Burns, John W. Harder