Patents by Inventor Thomas Stetzer
Thomas Stetzer 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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Publication number: 20050032005Abstract: A colour photographic recording material having a support, at least two blue-sensitive, yellow coupler-containing silver halide emulsion layers of differing photographic sensitivity, at least two green-sensitive, magenta coupler-containing silver halide emulsion layers of differing photographic sensitivity and at least two red-sensitive, cyan coupler-containing silver halide emulsion layers of differing photographic sensitivity, characterised in that the silver application rate is less than 3.2 g of silver per m2, camera sensitivity is at least ISO 100 and wherein, when an exposure is made of a grey card of density 0.6 with fluorescent light of light colour 21, the recording material gives rise to a hue on the print which, in CIELab values, meets the conditions a>0 and 0<b<30, if the photograph exposed with daylight is at a=b=0 with the same print filter pack, is distinguished by improved colour reproduction and in particular by a reduced green cast on exposure with fluorescent light.Type: ApplicationFiled: July 23, 2004Publication date: February 10, 2005Applicant: Agfa-Gevaert N.V.Inventors: Peter Bell, Thomas Stetzer, Klaus Wagner
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Patent number: 6824965Abstract: A bleach or bleach/fixing solution for processing photographic silver halide materials which, relative to the silver halide content of the unprocessed material, exhibit prior to the bleaching step a content of silver arising from development of at least 65 mol %, in particular for processing color reversal materials, characterized in that the solution contains at least one iron complex of propylenediaminetetraacetic acid or of &bgr;-alaninediacetic acid or a mixture of these complexes and the total concentration of the stated iron complexes in the solution is at least 0.045 and at most 0.25 mol/l and a process for processing, in which such a solution is used, is characterized by a small introduced quantity of iron complexes, a low residual silver content, a low bleaching fog value, elevated resistance to precipitation and in that the bleach solution may be rejuvenated.Type: GrantFiled: August 1, 2001Date of Patent: November 30, 2004Assignee: AGFA-GevaertInventors: Ralf Wichmann, Thomas Hübsch, Thomas Stetzer
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Patent number: 6562557Abstract: A color photographic material comprising a transparent support, at least one blue-sensitive, predominantly yellow-coupling silver halide emulsion layer, at least one green-sensitive, predominantly magenta-coupling silver halide emulsion layer (PP-1) and at least one red-sensitive, predominantly cyan-coupling silver halide emulsion layer (BG-1), characterised in that the spectral sensitivity distribution of BG-1 is characterised in that 605≦&lgr;max≦630 nm, 0.1≦&Dgr;lgE640≦0.6 and 1.Type: GrantFiled: July 19, 2001Date of Patent: May 13, 2003Assignee: Agfa-GevaertInventors: Klaus Wagner, Heinz Schütz, Peter Bell, Lothar Endres, Detlev Kapitza, Thomas Stetzer
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Publication number: 20020037482Abstract: A bleach or bleach/fixing solution for processing photographic silver halide materials which, relative to the silver halide content of the unprocessed material, exhibit prior to the bleaching step a content of silver arising from development of at least 65 mol %, in particular for processing color reversal materials, characterized in that the solution contains at least one iron complex of propylenediaminetetraacetic acid or of &bgr;-alaninediacetic acid or a mixture of these complexes and the total concentration of the stated iron complexes in the solution is at least 0.045 and at most 0.25 mol/l and a process for processing, in which such a solution is used, is characterized by a small introduced quantity of iron complexes, a low residual silver content, a low bleaching fog value, elevated resistance to precipitation and in that the bleach solution may be rejuvenated.Type: ApplicationFiled: August 1, 2001Publication date: March 28, 2002Inventors: Ralf Wichmann, Thomas Hubsch, Thomas Stetzer
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Publication number: 20020031734Abstract: A colour photographic material comprising a transparent support, at least one blue-sensitive, predominantly yellow-coupling silver halide emulsion layer, at least one green-sensitive, predominantly magenta-coupling silver halide emulsion layer (PP-1) and at least one red-sensitive, predominantly cyan-coupling silver halide emulsion layer (BG-1), characterised in that the spectral sensitivity distribution of BG-1 is characterised in thatType: ApplicationFiled: July 19, 2001Publication date: March 14, 2002Inventors: Klaus Wagner, Heinz Schtz, Peter Bell, Lothar Endres, Detlev Kapitza, Thomas Stetzer
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Patent number: 6228568Abstract: The present invention relates to a color photographic recording material which contains, in at least one layer between the substrate and light-sensitive emulsion layer situated nearest to the substrate, a compound of formula (I) wherein X and Y, independently of each other in each case, represent an electron-attracting group, and X and Y together can form a group which is necessary for the completion of a 5- or 6-membered ring.Type: GrantFiled: December 14, 1999Date of Patent: May 8, 2001Assignee: Agfa-GevaertInventors: Thomas Stetzer, Hans Langen, Heinz Schütz, Hans-Joachim Schumann, Klaus Sinzger, Johannes Willsau, Dirk Hübner, Engelbert Wiel
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Patent number: 6207283Abstract: A polymer of the formula (I): in which X1 means H or (R1)1+1—L1CO—, X2 means —(L2)m—OH or R1 means —COO−M+, —SO3−M+ or (M+)2PO32−, L1 means alkylene, arylene, aralkylene or cycloalkylene, L2 means the residue of a polyether having an average molecular weight of 200 to 3000 (number average), M+ means a cation, l means a number from 0 to 4, m means a number 0 or 1 and n means a number from 0 to 20, wherein m+n is ≧1.Type: GrantFiled: November 3, 1998Date of Patent: March 27, 2001Assignee: Agfa-GevaertInventors: Peter Bell, Günter Helling, Beate Weber, Ralf Büscher, Lothar Endres, Lothar Rosenhahn, Rainer Scheerer, Lydia Simon, Thomas Stetzer
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Patent number: 6093524Abstract: A color photographic film having a support, 2 or 3 red-sensitive, cyan-coupling silver halide emulsion layers, 2 or 3 green-sensitive, magenta-coupling silver halide emulsion layers, 2 or 3 blue-sensitive, yellow-coupling silver halide emulsion layers, conventional interlayers and protective layers together with a yellow filter layer arranged closer to the support than the blue-sensitive layers, wherein at least one green-sensitive silver halide emulsion layer is arranged further away from the support than all the other photosensitive layers, exhibits improved sharpness without color distortion if at least 50% of the projected surface area of the silver halide emulsion of the green-sensitive silver halide emulsion layer, of which there is at least one, consists of tabular silver halide grains having an aspect ratio of at least 3.Type: GrantFiled: September 16, 1998Date of Patent: July 25, 2000Assignee: Agfa-Gevaert NVInventors: Rainer Scheerer, Lothar Endres, Hans-Ulrich Borst, Lydia Simon, Thomas Stetzer, Peter Bell, Lothar Rosenhahn, Ralf Buscher
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Patent number: 6087083Abstract: A colour photographic material in which a package of layers is provided which consists, in the stated sequence, of (a) a silver halide-free layer containing colour coupler, (b) a layer containing silver halide and (c) a silver halide-free layer containing colour coupler, wherein at least one of layers (a) and (c) consists to an extent of at least 20 vol. % of a synthetic polymer, is distinguished by an improved grain/sensitivity ratio.Type: GrantFiled: November 3, 1998Date of Patent: July 11, 2000Assignee: Asfa-Gevaert N.V.Inventors: Peter Bell, Ralf Buscher, Lothar Endres, Lothar Rosenhahn, Rainer Scheerer, Lydia Simon, Thomas Stetzer
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Patent number: 6060227Abstract: A color negative film having a support, at least one blue-sensitive, yellow-coupling silver halide emulsion layer, at least one green-sensitive, magenta-coupling silver halide emulsion layer and at least one red-sensitive, cyan-coupling silver halide emulsion layer, wherein at least one of the color-sensitive silver halide emulsion layers consists of at least two sub-layers of differing photographic sensitivity, the coupler application rate in the most highly sensitive layer of the color sensitive silver halide emulsion layer, of which there is at least one, consisting of at least two sub-layers of differing photographic sensitivity, is no more than 0.05 mmol/m.sup.Type: GrantFiled: July 24, 1998Date of Patent: May 9, 2000Assignee: Agfa-Gevaert NVInventors: Ralf Buscher, Peter Bell, Hans-Ulrich Borst, Lothar Rosenhahn, Jorg Siegel, Thomas Stetzer
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Patent number: 6017689Abstract: A color photographic silver halide material having at least two blue-sensitive, yellow coupler containing silver halide emulsion layers, at least two green-sensitive, magenta coupler containing silver halide emulsion layers and at least two red-sensitive, cyan coupler containing silver halide emulsion layers together with conventional interlayers and protective layers, wherein photosensitive layers of identical color sensitivity differ with regard to the photographic sensitivity thereof and the more highly sensitive layers are arranged further away from the support than the less sensitive layers of identical color sensitivity, which material contains, in a layer which is arranged further from the support than the most highly sensitive, blue-sensitive layer, both at least one yellow coupler and at least one magenta or cyan coupler, is distinguished by improved grain and sensitivity combined with very good color reproduction.Type: GrantFiled: September 17, 1998Date of Patent: January 25, 2000Assignee: Agfa-Gevaert AGInventors: Peter Bell, Ralf Buscher, Lothar Endres, Lothar Rosenhahn, Rainer Scheerer, Lydia Simon, Thomas Stetzer
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Patent number: 5683863Abstract: A color photographic silver halide material having at least one silver halide emulsion layer, which is stabilized with a compound of formula (I) or (II) ##STR1## where X represents O or NR.sub.2Y represents halogen,Z.sup..crclbar. represents an anion,R.sub.1 represents hydrogen or a substituent, or jointly with X represents the remaining members of a condensed ringR.sub.2 represents hydrogen or a substituent, andQ represents the atoms required for the completion of a 5- or 6-membered ring, is characterized by enhanced stability.Type: GrantFiled: December 13, 1995Date of Patent: November 4, 1997Assignee: AGFA-Gevaert-AGInventors: Peter Bergthaller, Hans-Ulrich Borst, Peter Bell, Ralf Buscher, Johannes Willsau, Thomas Stetzer
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Patent number: 5407789Abstract: A photographic recording material on a transparent support having at least one light-sensitive silver halide emulsion layer and optionally conventional interlayers and protective layers, characterized in that the photographic recording material contains, in at least one of the above-mentioned layers, a compound corresponding to formula I, II or III ##STR1## wherein R.sub.1 denotes an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted heterocyclic group,R2 denotes hydrogen, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted alkylthio group,R.sub.Type: GrantFiled: February 1, 1994Date of Patent: April 18, 1995Assignee: Agfa-Gevaert AGInventors: Heinrich Odenwalder, Hans hlschlager, Thomas Stetzer
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Patent number: 5306605Abstract: A photographic recording material comprising a carrier and at least one photosensitive silver halide emulsion layer, a non-photosensitive layer and optional conventional intermediate and protective layers, characterised in that the photographic recording material (1) contains at least one silver halide emulsion layer having a silver iodide content .gtoreq.3 mol % and an average grain diameter .ltoreq.0.4 .mu.m, and (2), at least in one layer, contains a compound having the formula I ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 denote hydrogen, an optionally substituted hydrocarbon radical, an optionally substituted alkylthio, alkyloxy or arylthio radical, an optionally substituted amino group, OH or halogen or R.sup.1 and R.sup.2 together denote the radical for completing a carbocyclic or heterocyclic ring,R.sub.4, R.sub.5 denote hydrogen, an optionally substituted alkyl or aryl radical, or an optionally substituted heterocyclic radical,R.sub.6, R.sub.Type: GrantFiled: April 5, 1993Date of Patent: April 26, 1994Assignee: AGFA-Gevaert AGInventors: Heinrich Odenwalder, Lothar Rosenhahn, Thomas Stetzer