Patents by Inventor Paul Tschopp
Paul Tschopp 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: 4743683Abstract: A photographic recording material which contains at least one dye of the formula ##STR1## wherein D is the group of atoms necessary to complete a 5-membered ring that contains at least one nitrogen atom, A is hydrogen, alkyl, alkoxy, phenyl, alkylthio, cyano, nitro or halogen, n is 0 to 3, R.sub.1 is hydrogen, alkyl, hydroxyl, acylamino, R.sub.6 is hydrogen or unsubstituted or substituted amino, and R.sub.4 is hydrogen or alkoxy. The material is distinguished by good color reproduction, brilliant colors and excellent lightfastness.Type: GrantFiled: December 3, 1986Date of Patent: May 10, 1988Assignee: Ciba-Geigy AGInventor: Paul Tschopp
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Patent number: 4732997Abstract: Photographic material containing magenta coupler is stabilized by incorporating a dibenzoxaphosphorin of the formula ##STR1## into the emulsion layer containing the coupler or into an adjoining colloid layer. The yellowing on dark storage of such material is substantially reduced as a result.The symbols A and n are defined in claim 1.Type: GrantFiled: November 18, 1986Date of Patent: March 22, 1988Assignee: Ciba-Geigy AGInventors: Paul Tschopp, David G. Leppard
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Patent number: 4661437Abstract: A photographic recording material which contains at least one dye of the formula ##STR1## wherein D is the group of atoms necessary to complete a 5-membered ring that contains at least one nitrogen atom, A is hydrogen, alkyl, alkoxy, phenyl, alkylthio, cyano, nitro or halogen, n is 0 to 3, R.sub.1 is hydrogen, alkyl, hydroxyl, acylamino, R.sub.6 is hydrogen or unsubstituted or substituted amino, and R.sub.4 is hydrogen or alkoxy. The material is distinguished by good color reproduction, brilliant colors and excellent lightfastness.Type: GrantFiled: July 19, 1985Date of Patent: April 28, 1987Assignee: Ciba-Geigy AGInventor: Paul Tschopp
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Patent number: 4661440Abstract: Photographic material containing magenta coupler is stabilized by incorporating a dibenzoxaphosphorin of the formula ##STR1## into the emulsion layer containing the coupler or into an adjoining colloid layer. The yellowing on dark storage of such material is substantially reduced as a result.The symbols A and n are defined in claim 1.Type: GrantFiled: November 7, 1985Date of Patent: April 28, 1987Assignee: Ciba-Geigy AGInventors: Paul Tschopp, David G. Leppard
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Patent number: 4324898Abstract: Color photographic material is provided which comprises at least one silver halide emulsion layer containing a yellow color coupler of the formula ##STR1## in which G represents a yellow coupler radical bonded via the active methine group to the heterocyclic ring, Z represents --CO-- or --SO.sub.2 -- and M represents a substituent and A represents the non-metallic atoms necessary to complete a five-membered saturated heterocyclic ring.The new two-equivalent yellow couplers lead due to their improved reactivity (high maximum density), minimal fog and high fastness to light and outstanding spectral properties of the dyestuffs formed therefrom to a color photographic material of advantageous properties.Type: GrantFiled: August 30, 1979Date of Patent: April 13, 1982Assignee: Ciba Geigy AGInventor: Paul Tschopp
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Patent number: 4268591Abstract: Light-sensitive recording material for color photography, which contains, in at least one silver halide emulsion layer, at least one yellow coupler of the formula ##STR1## in which R.sub.1 is alkyl, R.sub.2 is alkyl or aryl and R.sub.3 is substituted or unsubstituted alkyl, alkoxy or alkylmercapto, cycloalkylmercapto, aryl, aryloxy or arylmercapto, the sum of the carbon atoms in the substituents R.sub.1, R.sub.2 and R.sub.3 being 3 to 30 and at least two of these substituents being able to form a cyclic radical together with the carbon atom to which they are bonded, the R.sub.4 s are each halogen, alkyl, alkoxy, halogenoalkyl, alkylsulfonyl or aryloxy, X is a radical detachable during the coupling reaction, A is a 5-membered, heterocyclic, unsaturated ring system which contains 2 or 3 hetero-atoms, at least one of which is a nitrogen atom, and can be fused with a benezene ring and which is substituted by at least one ballast group and r is 1 or 2.Type: GrantFiled: August 28, 1979Date of Patent: May 19, 1981Assignee: Ciba-Geigy AGInventor: Paul Tschopp
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Patent number: 4268592Abstract: Light-sensitive recording material for color photography, which contains, in at least one silver halide emulsion layer, at least one magenta coupler of the formula ##STR1## in which A is a 5-membered, heterocyclic, unsaturated ring system which contains 2 or 3 hetero-atoms, at least one of which is a nitrogen atom, and can be fused with a benzene ring and which is substituted by at least one ballast group, R is a substituted or unsubstituted aryl radical, R.sub.1 is hydrogen, halogen, alkyl, alkoxy, halogenoalkyl, alkylsulfonyl or aryloxy and X is a radical detachable during the coupling reaction.The magenta couplers show high reactivity (high maximum density), which facilitates accelerated processing of the photographic materials, and minimal fogging. The couplers also have good fastness to light.Type: GrantFiled: August 28, 1979Date of Patent: May 19, 1981Assignee: Ciba-Geigy AGInventor: Paul Tschopp
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Patent number: 4229577Abstract: Color photographic material is provided which contains at least one silver halide emulsion layer containing a yellow color coupler of the formula ##STR1## wherein G is the radical of a yellow coupler which is bonded to the heterocyclic ring by means of the active methylene group, Z is --CO-- or --SO.sub.2 --, M is hydrogen if Z is --CO--, or a substituent and R is hydrogen or a substituent.The new two-equivalent yellow couplers lead due to their improved reactivity (high maximum density), minimal fog and high fastness to light and outstanding spectral properties of the dyestuffs formed therefrom to a color photographic material of advantageous properties.Type: GrantFiled: April 27, 1978Date of Patent: October 21, 1980Assignee: Ciba-Geigy AGInventors: Graham Evans, Mario Fryberg, Thomas Stauner, Paul Tschopp, David G. Leppard
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Patent number: 4206278Abstract: Color photographic material is provided which comprises at least one silver halide emulsion layer containing a yellow color coupler of the formula ##STR1## in which G represents a yellow coupler radical bonded via the active methine group to the heterocyclic ring, Z represents --CO-- or --SO.sub.2 -- and M represents a substituent and A represents the non-metallic atoms necessary to complete a five-membered saturated heterocyclic ring.The new two-equivalent yellow couplers lead due to their improved reactivity (high maximum density), minimal fog and high fastness to light and outstanding spectral properties of the dyestuffs formed therefrom to a color photographic material of advantageous properties.Type: GrantFiled: April 12, 1978Date of Patent: June 3, 1980Assignee: Ciba-Geigy AGInventor: Paul Tschopp
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Patent number: 4118232Abstract: The invention is directed essentially to photographic material containing, on a carrier, a layer with azo dyestuffs of the formula ##STR1## wherein A, B, X and Y are certain substituents, in a second main aspect azo dyestuffs of the formula ##STR2## wherein B' represents certain substituents and in a third main aspect azo deystuffs of the formulaA.sub.1 --N.dbd.N--B.sub.1 --NH--CO--X.sub.1 --Y--Z.sub.1 --OC--HN--B.sub.1 --N.dbd.N--A.sub.1wherein A.sub.1, B.sub.1, X.sub.1, Z.sub.1 and Y are certain substituents.The photographic materials provide advantages stemming from the use of the dyestuffs of the invention which are distinguished by particularly high fastness to light coupled with excellent bleachability, good resistance to diffusion and advantageous color strength.Type: GrantFiled: March 15, 1977Date of Patent: October 3, 1978Assignee: Ciba-Geigy AGInventors: Bernhard Piller, John Lenoir, Alfred Froehlich, Thomas Stauner, Paul Tschopp
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Patent number: 4115121Abstract: Color photographic material is provided which contains at least one silver halide emulsion layer containing a yellow color coupler of the formula ##STR1## wherein G is the radical of a yellow coupler which is bonded to the heterocyclic ring by means of the active methylene group, Z is --CO-- or --SO.sub.2 --, M is hydrogen if Z is --CO--; or a substituent and R is hydrogen or a substituent.Type: GrantFiled: March 30, 1977Date of Patent: September 19, 1978Assignee: Ciba-Geigy AGInventors: Graham Evans, Mario Fryberg, Thomas Stauner, Paul Tschopp, David G. Leppard
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Patent number: 4051123Abstract: In a first main aspect azo dyestuffs of the formula ##STR1## wherein A, B, X and Y are certain substituents, in a second main aspect azo dyestuffs of the formula ##STR2## wherein B' represents certain substituents and in a third main aspect azo dyestuffs of the formulaA.sub.1 --N.dbd.N--B.sub.1 --NH--CO--X.sub.1 --Y--Z.sub.1 --OC--HN--B.sub.1 --N.dbd.N--A.sub.1wherein A.sub.1, B.sub.1, X.sub.1, Z.sub.1 and Y are certain substituents as well as the use of said azo dyestuffs in photographic material are disclosed.Type: GrantFiled: August 21, 1975Date of Patent: September 27, 1977Assignee: Ciba-Geigy AGInventors: Bernhard Piller, John Lenoir, Alfred Froehlich, Thomas Stauner, Paul Tschopp
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Patent number: 4026709Abstract: The present invention relates to new compounds having an active methylene group or phenolic hydroxyl group and therefore capable of being used as photographic color couplers. The new compounds contain at least one radical of a phosphoric acid diester, phosphonic acid diester, phosphoric acid diamide, phosphonic acid diamide, phosphoric acid ester-amide or phosphonic acid ester-amide.Type: GrantFiled: April 19, 1976Date of Patent: May 31, 1977Assignee: Ciba-Geigy AGInventors: Bernhard Piller, Paul Tschopp, Thomas Stauner, Walter Heierli
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Patent number: 3984432Abstract: The present invention relates to new compounds having an active methylene group or phenolic hydroxyl group and therefore capable of being used as photographic color couplers. The new compounds contain at least one radical of a phosphoric acid diester, phosphonic acid diester, phosphoric acid diamide, phosphonic acid diamide, phosphoric acid ester-amide or phosphonic acid ester-amide.Type: GrantFiled: February 27, 1974Date of Patent: October 5, 1976Assignee: Ciba-Geigy AGInventors: Bernhard Piller, Paul Tschopp, Thomas Stauner, Walter Heierli
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Patent number: 3931142Abstract: Polyazo dyestuffs of the formulaA--N=N--M--D--M'--N=N--A'wherein A and A' each represents a 2(8)-amino-8(2)-hydroxynaphthalene radical further substituted with a sulphonic acid group, M and M' each represents a substituted 1,4- or 1,3-phenylene radical and D represents an organic radical bonded in the manner of an amide to M and M', said dyestuffs containing at least two sulphonic acid groups in the molecule, as well as photographic material containing in at least one layer a polyazo dyestuff of the above formula are described.Type: GrantFiled: October 23, 1973Date of Patent: January 6, 1976Assignee: Ciba-Geigy AGInventors: John Lenoir, Paul Tschopp, Hansrolf Loeffel, DE Montmollin: Rene