Patents by Inventor David P. Waller
David P. Waller 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: 6103912Abstract: A novel class of bridged indicator dyes is disclosed which possess absorption in the infrared region of the electromagnetic spectrum. These bridged indicator dyes are useful as light-absorbing, pH-sensitive optical filter agents in diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes. These indicator dyes will also find utility in titrations and other analytical techniques and products where pH-sensitive indicator dyes are employed and absorption of infrared is useful.Type: GrantFiled: March 31, 1993Date of Patent: August 15, 2000Assignee: Polaroid CorporationInventors: Charles E. Jandrue, Sr., Marcis M. Kampe, Myron S. Simon, David P. Waller, David C. Whritenour
-
Patent number: 5811530Abstract: There are described image-recording materials which include an image dye-providing compound comprising a novel naphthol azo cyan dye having a 3-aminobenzoisothiazole moiety. The image dye-providing compound includes a diffusion control moiety such as a hydroquinonyl developer group, a precursor thereof or a thiazolidine moiety and, may be diffusible or nondiffusible as a function of the diffusion control moiety.Image-recording materials according to the invention including those which contain high potential developers such as aminoreductone allow sufficient cyan chromophore to diffuse to the image-receiving layer to provide an acceptable photograph and result in no appreciable reduction of the 3-aminobenzoisothiazole moiety of the novel naphthol azo cyan dye.Type: GrantFiled: August 20, 1997Date of Patent: September 22, 1998Assignee: Polaroid CorporationInventors: Michael J. Arnost, Peter Viski, David P. Waller, David C. Whritenour
-
Patent number: 5717079Abstract: There are described color-providing compounds having at least two cyclic 1,3-sulfur-nitrogen moieties and one complete dye or dye intermediate. The color-providing compound is stable in the photographic processing composition but capable of undergoing cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex made available as a function of development to liberate a complete dye or dye intermediate in an imagewise distribution corresponding to that of the silver ion and/or the soluble silver complex. The color-providing compounds are useful as image-forming materials in color photographic, photothermographic, thermographic, and other processes.Type: GrantFiled: March 10, 1997Date of Patent: February 10, 1998Assignee: Polaroid CorporationInventors: Peter Viski, David P. Waller
-
Patent number: 5716754Abstract: There are described image-recording materials which include an image dye-providing compound comprising a novel naphthol azo cyan dye having a 3-aminobenzoisothiazole moiety. The image dye-providing compound includes a diffusion control moiety such as a hydroquinonyl developer group, a precursor thereof or a thiazolidine moiety and, may be diffusible or nondiffusible as a function of the diffusion control moiety.Image-recording materials according to the invention including those which contain high potential developers such as aminoreductone allow sufficient cyan chromophore to diffuse to the image-receiving layer to provide an acceptable photograph and result in no appreciable reduction of the 3-aminobenzoisothiazole moiety of the novel naphthol azo cyan dye.Type: GrantFiled: September 18, 1996Date of Patent: February 10, 1998Assignee: Polaroid CorporationInventors: Michael J. Arnost, Peter Viski, David P. Waller, David C. Whritenour
-
Patent number: 5691458Abstract: There are described compounds which are represented by the formula ##STR1## The compounds are useful as dyes, and as intermediates and dye moieties in the preparation of compounds, which are particularly useful in imaging applications, such as, for example, diffusion transfer photographic systems.Type: GrantFiled: September 18, 1996Date of Patent: November 25, 1997Assignee: Polaroid CorporationInventors: Michael J. Arnost, Peter Viski, David P. Waller, David C. Whritenour
-
Patent number: 5674986Abstract: There are described heat-developable photosensitive image-recording materials which include a compound having at least one cyclic 1,3-sulfur-oxygen moiety. The compound is stable in the photographic processing composition but capable of undergoing cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex made available as a function of development to liberate a reagent in an imagewise distribution corresponding to that of the silver ion and/or the soluble silver complex. The reagent includes a photographically useful group such as a complete dye or dye intermediate.Type: GrantFiled: May 13, 1996Date of Patent: October 7, 1997Assignee: Polaroid CorporationInventors: Peter Viski, David P. Waller
-
Patent number: 5667943Abstract: Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.Type: GrantFiled: April 8, 1996Date of Patent: September 16, 1997Assignee: Polaroid CorporationInventors: Roger A. Boggs, Jurgen M. Grasshoff, Mark R. Mischke, Anthony J. Puttick, Stephen J. Telfer, David P. Waller, Kenneth C. Waterman
-
Patent number: 5658705Abstract: There are described color-providing compounds having at least two cyclic 1,3-sulfur-nitrogen moieties and one complete dye or dye intermediate. The color-providing compound is stable in the photographic processing composition but capable of undergoing cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex made available as a function of development to liberate a complete dye or dye intermediate in an imagewise distribution corresponding to that of the silver ion and/or the soluble silver complex. The color-providing compounds are useful as image-forming materials in color photographic, photothermographic, thermographic, and other processes.Type: GrantFiled: November 20, 1996Date of Patent: August 19, 1997Assignee: Polaroid CorporationInventors: Peter Viski, David P. Waller
-
Patent number: 5569574Abstract: There are described heat-developable photosensitive image-recording materials which include a compound having at least one cyclic 1,3-sulfur-oxygen moiety. The compound is stable in the photographic processing composition but capable of undergoing cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex made available as a function of development to liberate a reagent in an imagewise distribution corresponding to that of the silver ion and/or the soluble silver complex. The reagent includes a photographically useful group such as a complete dye or dye intermediate.Type: GrantFiled: November 13, 1995Date of Patent: October 29, 1996Assignee: Polaroid CorporationInventors: Peter Viski, David P. Waller
-
Patent number: 5534393Abstract: Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.Type: GrantFiled: November 28, 1994Date of Patent: July 9, 1996Assignee: Polaroid CorporationInventors: Roger A. Boggs, Jurgen M. Grasshoff, Mark R. Mischke, Anthony J. Puttick, Stephen J. Telfer, David P. Waller, Kenneth C. Waterman
-
Patent number: 5430156Abstract: There are disclosed color-providing compounds comprising two or more cyclic 1,3 sulfur-nitrogen groups and two or more color-providing moieties, i.e., complete dyes or dye intermediates, capable of releasing the color-forming moieties upon cleavage in the presence of silver ions or a soluble silver complex. The color-providing compounds are useful as image-forming materials in color photographic processes.Type: GrantFiled: February 4, 1994Date of Patent: July 4, 1995Assignee: Polaroid CorporationInventors: Michael J. Arnost, Efthimios Chinoporos, Donald A. McGowan, David P. Waller
-
Patent number: 5424475Abstract: Colorless precursors of preformed image dyes are provided which are useful as the color image-forming materials in thermal imaging systems. These colorless precursors possess at least one thermal protecting group that undergoes fragmentation upon heating and at least one leaving group that undergoes irreversible elimination upon heating, said protecting and leaving groups maintaining the precursor in its colorless form until heat is applied to effect removal of these groups whereby the precursor is converted to an image dye.Type: GrantFiled: July 12, 1991Date of Patent: June 13, 1995Assignee: Polaroid CorporationInventors: Roger A. Boggs, Alan L. Borror, Patrick R. Conlon, Richard L. Cournoyer, Ernest W. Ellis, David P. Waller
-
Patent number: 5415970Abstract: There are disclosed color-providing compounds comprising two or more cyclic 1,3 sulfur-nitrogen groups and two or more color-providing moieties, i.e., complete dyes or dye intermediates, capable of releasing the color-forming moieties upon cleavage in the presence of silver ions or a soluble silver complex. The color-providing compounds are useful as image-forming materials in color photographic processes.Type: GrantFiled: February 4, 1994Date of Patent: May 16, 1995Assignee: Polaroid CorporationInventors: Michael J. Arnost, Efthimios Chinoporos, Donald A. McGowan, David P. Waller
-
Patent number: 5414091Abstract: There are disclosed dye-providing compounds comprising color coupler dyes substituted on the phenylene diamine portion with one or two cyclic 1,3-sulfur-nitrogen groups. The dye-providing compounds are capable of releasing the coupler dye upon cleavage in the presence of silver ions or a soluble silver complex. The dye-providing compounds are useful as image-forming materials in color thermographic, photothermographic and other photographic processes.Type: GrantFiled: May 23, 1994Date of Patent: May 9, 1995Assignee: Polaroid CorporationInventors: Efthimios Chinoporos, Robert H. Pauze, David P. Waller, David C. Whritenour
-
Patent number: 5401619Abstract: Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.Type: GrantFiled: August 13, 1993Date of Patent: March 28, 1995Assignee: Polaroid CorporationInventors: Roger A. Boggs, Jurgen M. Grasshoff, Mark R. Mischke, Anthony J. Puttick, Stephen J. Telfer, David P. Waller, Kenneth C. Waterman
-
Patent number: 5399709Abstract: A novel class of N-substituted triarylmethane sulfonamides is provided which undergo reversible oxidation into colored form and reversible reduction of the oxidized form into colorless form. The N-substituted triarylmethane sulfonamides can be represented by the formulae: ##STR1## wherein B is a carbocyclic ring or rings; T is a 5- or 6-membered ring; Y is a moiety selected from ##STR2## wherein E, positioned ortho or para to said --OH group, is selected from --OH, --NH.sub.2, --NHR', --NR'R" and --NHSO.sub.Type: GrantFiled: June 11, 1993Date of Patent: March 21, 1995Assignee: Polaroid CorporationInventors: Myron S. Simon, Marcis M. Kampe, David P. Waller
-
Patent number: 5368979Abstract: There are described heat-developable photosensitive image-recording elements which include a photosensitive silver halide emulsion, a silver salt and an image dye-providing material. The silver salt material is provided in a layer which is separated from the layer including the image dye-providing material by a layer containing the silver halide emulsion.Type: GrantFiled: January 27, 1994Date of Patent: November 29, 1994Assignee: Polaroid CorporationInventors: James R. Freedman, David P. Waller
-
Patent number: 5350870Abstract: Leuco dyes are provided which comprise the coupling product of a N-acyl substituted aromatic amino color developer and a dye-forming coupler moiety substituted at the coupling carbon with a thermally removable leaving group. Thermal imaging systems employing these leuco dyes have the advantage of reduced bubble formation relative to thermal imaging systems employing prior art leuco dyes containing a group which thermally fragments into one or more gases.Type: GrantFiled: April 12, 1993Date of Patent: September 27, 1994Assignee: Polaroid CorporationInventors: Roger A. Boggs, Richard L. Cournoyer, Ernest W. Ellis, Sandra E. Russo-Rodriguez, Stephen J. Telfer, David P. Waller, Michael J. Zuraw
-
Patent number: 5340689Abstract: There are disclosed dye-providing compounds comprising color coupler dyes substituted on the phenylene diamine portion with one or two cyclic 1,3 -sulfur-nitrogen groups. The dye-providing compounds are capable of releasing the coupler dye upon cleavage in the presence of silver ions or a soluble silver complex. The dye-providing compounds are useful as image-forming materials in color thermographic, photothermographic and other photographic processes.Type: GrantFiled: May 6, 1993Date of Patent: August 23, 1994Assignee: Polaroid CorporationInventors: Efthimios Chinoporos, Robert H. Pauze, David P. Waller, David C. Whritenour
-
Patent number: 5332654Abstract: A novel class of N-substituted triarylmethane sulfonamides is provided which undergo reversible oxidation into colored form and reversible reduction of the oxidized form into colorless form. Preferred embodiments comprise xanthene sulfonamides having N-aryl substituents, e.g., hydroquinone substituents. These compounds possess redox potentials ranging between about +200 to -500 millivolts and thus are useful as dyes for producing photographic, photothermographic, thermal, and pressure-induced images, as well as being useful as redox indicators in a wide variety of biological and chemical reactions.Type: GrantFiled: June 11, 1993Date of Patent: July 26, 1994Assignee: Polaroid CorporationInventors: Myron S. Simon, Marcis M. Kampe, David P. Waller