Patents by Inventor Terence C. Webb
Terence C. Webb 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: 5376510Abstract: There is described a concentrated photographic silver halide developing solution which comprises from 50 to 150 g/liter of an ascorbic acid type compound of the general formula I: ##STR1## or alkali metal salts thereof, in which the group R represents a hydroxylated alkyl group, and at least one basic compound the anion of which is carbonate, sulphite or hydroxide of which the cation is an alkali metal, especially sodium or potassium, the total sodium to total potassium ion ratio in the concentrated developing solution being from about 50:50 to 0:100 (mole: mole).Preferably the concentrated solution is entirely aqueous but it may comprise a proportion of water-miscible organic solvents such as ethyl alcohol, or glycol solvents.Type: GrantFiled: December 13, 1993Date of Patent: December 27, 1994Assignee: Ilford LimitedInventors: Michael J. Parker, Anthony M. Lannon, Terence C. Webb, William E. Long
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Patent number: 4948714Abstract: Method of processing photographic silver halide material wherein an imagewise release of the development inhibitor 1-aryltetrazole-5-thiol is achieved during processing.Type: GrantFiled: August 22, 1989Date of Patent: August 14, 1990Assignee: Ilford LimitedInventors: William E. Long, Kenneth M. McCombe, Marion R. Palmer, Terence C. Webb
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Patent number: 4753869Abstract: Salts of 1-phenyl-3-pyrazolidinones with organic sulphonic acids, which are useful photographic silver halide developing agents.Type: GrantFiled: November 24, 1986Date of Patent: June 28, 1988Assignee: Ciba-Geigy AGInventors: William E. Long, Malcolm D. Tirel, Monica H. Gent, Terence C. Webb
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Patent number: 4560646Abstract: Compounds of the formula ##STR1## wherein L is a direct bond or consists of a chain of carbon atoms or of a divalent ring system, R.sub.1 to R.sub.4 are hydrogen or alkyl, R.sub.5 or R.sub.6 are hydrogen, alkyl or aryl, or R.sub.5 together with R.sub.6 complete a ring system, and R.sub.7 is hydrogen or a group of the formula ##STR2## wherein L, R.sub.5 and R.sub.6 are as defined. These compounds are useful developing agents for activation processing.Type: GrantFiled: November 21, 1984Date of Patent: December 24, 1985Assignee: Ciba Geigy AGInventors: William E. Long, Norman A. Smith, Terence C. Webb, Stephen R. Postle, Kenneth M. McCombe, Martin C. Grossel
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Patent number: 4490461Abstract: Process for the preparation of a photographic material comprising in at least one layer photographic useful compounds, e.g. color couplers or developers, which are occluded into solid polymer particles of 0.1 to 0.5 .mu.m in size.Type: GrantFiled: July 11, 1983Date of Patent: December 25, 1984Assignee: Ciba-Geigy AGInventors: Terence C. Webb, Peter A. Lovell, Samuel B. Kingston
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Patent number: 4362878Abstract: Development inhibitor releasing compounds of the formula: ##STR1## are provided wherein R.sub.1 is hydrogen or a substituent which may contain a long chain ballasting group and n is 1 or 2, or R.sub.1 may form an annelated ring, R.sub.2 is hydrogen or alkyl having 1 to 4 carbon atoms, R.sub.3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR.sub.4, --COR.sub.4, ##STR2## or --OR.sub.4 where R.sub.4 is alkyl or aryl or a group ##STR3## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring which optionally may be benzannelated.The new DIR-compounds form colorless compounds when reacted with the oxidation products of the color developing agent. They have an extremely high reactivity with the oxidation products of the color developing agent so that only small quantities of the DIR-compounds are required to produce excellent intra-image and inter-image effects of excellent speed.Type: GrantFiled: June 12, 1980Date of Patent: December 7, 1982Assignee: Ciba-Geigy AGInventor: Terence C. Webb
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Patent number: 4353974Abstract: A process for the production of a photographic image which comprises(a) imagewise exposing a photographic assembly which comprises at least during a silver halide developing step, in order optionally a supercoat layer, at least one silver halide emulsion layer, a layer containing a layer substantive hydroxypyridone azamethine compound of the general formula ##STR1## wherein R.sub.1 is hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl, amino or heterocyclic radical, Y represents hydrogen or hydroxy, --CN, --COOR.sup.1, --CONR.sup.1 R.sup.2 or --COR.sup.1 or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical and Z is hydrogen or is --CN, --COOR.sup.3, --CONR.sup.3 R.sup.4, --SO.sub.3 H, --SO.sub.3.sup.- or --COR.sup.3, where R.sup.1, R.sup.2, R.sup.3 and R.sup.Type: GrantFiled: February 23, 1981Date of Patent: October 12, 1982Assignee: Ciba-Geigy AGInventors: Terence C. Webb, Patrick D. P. Thomas, William E. Long
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Patent number: 4259437Abstract: Development inhibitor releasing compounds of the formula ##STR1## are provided wherein R.sub.1 is hydrogen or a substituent which may contain a long chain ballasting group and n is 1 or 2, or R.sub.1 may form an annelated ring, R.sub.2 is hydrogen or alkyl having 1 to 4 carbon atoms, R.sub.3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR.sub.4, --COR.sub.4, ##STR2## or --OR.sub.4 where R.sub.4 is alkyl or aryl or a group ##STR3## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring which optionally may be benzannelated.The new DIR-compounds form colorless compounds when reacted with the oxidation products of the color developing agent. They have an extremely high reactivity with the oxidation products of the color developing agent so that only small quantities of the DIR-compounds are required to produce excellent intra-image and inter-image effects of excellent speed.Type: GrantFiled: September 5, 1979Date of Patent: March 31, 1981Assignee: Ciba-Geigy AGInventor: Terence C. Webb
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Patent number: 4233399Abstract: Pyridone dyestuffs of the formula ##STR1## are provided wherein R.sub.1 is hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical or an optionally substituted amino group,R.sub.2, R.sub.3, R.sub.4 each independently represent hydrogen, halogen, alkoxy, or optionally substituted alkyl or cycloalkyl,R.sub.5 and R.sub.6 each independently represent hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical or R.sub.5 and R.sub.6, R.sub.3 and R.sub.5 and R.sub.4 and R.sub.6 form heterocyclic rings,Y is hydrogen or hydroxy, --CN, --COOR.sub.7, --CONR.sub.7 R.sub.8 or --COR.sub.7 or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical, andZ represents --CN, --COOR.sub.9, --CONR.sub.9 R.sub.10, --SO.sub.3 H, --SO.sub.3 .crclbar. or --COR.sub.9, where R.sub.7, R.sub.8, R.sub.9 and R.sub.10 each independently represent hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical.Type: GrantFiled: May 8, 1979Date of Patent: November 11, 1980Assignee: Ciba-Geigy AktiengesellschaftInventors: Rainer Kitzing, John G. V. Scott, Terence C. Webb, Graham Evans
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Patent number: 4226934Abstract: A light-sensitive photographic material is provided which comprises, coated on a photobase, at least one silver halide emulsion layer, said emulsion layer or a layer adjacent thereto containing a development inhibitor releasing compound of the formula ##STR1## wherein R.sub.1 is substituted phenyl which contains a ballasting alkyl group, R.sub.2 represents the atoms necessary to complete a five or six membered heterocyclic ring system which may be further substituted and R.sub.3 is an aryl or heterocyclic radical, any of which ring systems may be further substituted, the group --S--R.sub.3 being a development inhibiting group.Type: GrantFiled: July 26, 1978Date of Patent: October 7, 1980Assignee: Ciba-Geigy AGInventors: Terence C. Webb, David L. R. Reeves
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Patent number: 4182886Abstract: Pyridone dyestuffs of the formula ##STR1## are provided wherein R.sub.1 is hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical or an optionally substituted amino group, R.sub.2, R.sub.3, R.sub.4 each independently represent hydrogen, halogen, alkoxy, or optionally substituted alkyl or cycloalkyl, R.sub.5 and R.sub.6 each independently represent hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical or R.sub.5 and R.sub.6, R.sub.3 and R.sub.5 and R.sub.4 and R.sub.6 form heterocyclic rings, Y is hydrogen or hydroxy, --CN, --COOR.sub.7, --CONR.sub.7 R.sub.8 or --COR.sub.7 or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical, and Z represents --CN, --COOR.sub.9, --CONR.sub.9 R.sub.10, --SO.sub.3 H, --SO.sub.3 .crclbar. or --COR.sub.9, where R.sub.7, R.sub.8, R.sub.9 and R.sub.Type: GrantFiled: February 21, 1978Date of Patent: January 8, 1980Assignee: Ciba-Geigy AktiengesellschaftInventors: Rainer Kitzing, John G. V. Scott, Terence C. Webb, Graham Evans