Patents by Inventor Joseph G. Lighthouse
Joseph G. Lighthouse 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: 6673529Abstract: A process of preparing a high bromide tabular grain emulsion comprising a dispersion medium and silver halide grains including tabular grains having {111} major faces and an aspect ratio of at least 2, which contain greater than 50 mole percent bromide, based on silver, and which account for greater than 50 percent of total grain projected area, where such tabular grains have an average aspect ratio of at least 5, the process comprising (i) in a grain nucleation step creating in a dispersing medium tabular silver halide grain nuclei containing parallel twin planes and (ii) in a grain growth step subsequently growing the tabular grain nuclei into tabular grains in a silver halide reaction vessel by adding a silver ion source and a halide ion source to the reaction vessel and precipitating silver halide onto the tabular grain nuclei, wherein thiocyanate ion is introduced into the silver halide reaction vessel prior to the addition of at least the final 10 mole percent of the total silver added to theType: GrantFiled: July 11, 2002Date of Patent: January 6, 2004Assignee: Eastman Kodak CompanyInventors: Richard L. Daubendiek, Jon N. Eikenberry, Barbara J. Fisher, Timothy R. Gersey, Joseph G. Lighthouse, Douglas L. Oehlbeck
-
Patent number: 5837439Abstract: The invention relates to a solution for forming silver halide emulsions comprising water, a gelatin containing less than 30 micromoles of methionine per gram of gelatin, and at least one antifoamant of Formula I(H.sub.3 C).sub.3 Si--(OSi(CH.sub.3).sub.2).sub.m --OSi(CH.sub.3).sub.3wherein m is the average number of dimethyl siloxane units.Type: GrantFiled: March 4, 1997Date of Patent: November 17, 1998Assignee: Eastman Kodak CompanyInventors: Richard L. Daubendiek, Michael W. Orem, Douglas L. Oehlbeck, Joseph G. Lighthouse
-
Patent number: 5629144Abstract: The invention provides a radiation-sensitive silver halide emulsion comprisingsilver halide grains including tabular grains(a) having {111} major faces(b) containing greater than 70 mole percent bromide, based on silver,(c) accounting for greater than 90 percent of total grain projected area,(d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m,(e) exhibiting an average thickness of less than 0.07 .mu.m, and(f) having latent image forming chemical sensitization sites on the surfaces of the tabular rains, anda spectral sensitizing dye adsorbed to the surfaces of the tabular grains,wherein the surface chemical sensitization sites include at least one silver salt epitaxially located on said tabular rains and wherein said grains further comprise a mercapto compound represented by Formula III ##STR1## where R.sup.1 is an aliphatic or aromatic radical containing up to 20 carbon atoms.Type: GrantFiled: December 23, 1994Date of Patent: May 13, 1997Assignee: Eastman Kodak CompanyInventors: Richard L. Daubendiek, Donald L. Black, Joseph C. Deaton, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Xin Wen, Robert D. Wilson
-
Patent number: 5614358Abstract: A chemically and spectrally sensitized ultrathin tabular grain emulsion is disclosed including tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (e) exhibiting an average thickness of less than 0.07 .mu.m.It has been observed that increased speed and contrast as well as improvements in speed-granularity relationships can be realized when the surface chemical sensitization sites include epitaxially deposited silver halide protrusions forming epitaxial junctions with the tabular grains, the protrusions (a) being located on up to 50 percent of the surface area of the tabular grains, (b) having a higher overall solubility than at least that portion of the tabular grains forming epitaxial junctions with the protrusions, and (c) forming a face centered cubic crystal lattice.Type: GrantFiled: May 15, 1995Date of Patent: March 25, 1997Assignee: Eastman Kodak CompanyInventors: Robert D. Wilson, Myra T. Olm, Richard L. Daubendiek, Donald L. Black, Joseph C. Deaton, Timothy R. Gersey, Joseph G. Lighthouse, Xin Wen
-
Patent number: 5582965Abstract: A chemically and spectrally sensitized ultrathin tabular grain emulsion is disclosed including tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (e) exhibiting an average thickness of less than 0.07 .mu.m.Type: GrantFiled: May 26, 1995Date of Patent: December 10, 1996Assignee: Eastman Kodak CompanyInventors: Joseph C. Deaton, Richard L. Daubendiek, Donald L. Black, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Xin Wen, Robert D. Wilson
-
Patent number: 5576168Abstract: A chemically and spectrally sensitized ultrathin tabular grain emulsion is disclosed including tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (e) exhibiting an average thickness of less than 0.07 .mu.m.Type: GrantFiled: August 26, 1994Date of Patent: November 19, 1996Assignee: Eastman Kodak CompanyInventors: Richard L. Daubendiek, Donald L. Black, Joseph C. Deaton, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Xin Wen, Robert D. Wilson
-
Patent number: 5576171Abstract: A chemically and spectrally sensitized tabular grain emulsion is disclosed including tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (f) exhibiting an average thickness in the range of from less than 0.3 .mu.m to at least 0.07 .mu.m.Type: GrantFiled: May 15, 1995Date of Patent: November 19, 1996Assignee: Eastman Kodak CompanyInventors: Myra T. Olm, Richard L. Daubendiek, Joseph C. Deaton, Donald L. Black, Timothy R. Gersey, Joseph G. Lighthouse, Xin Wen, Robert D. Wilson
-
Patent number: 5573902Abstract: A chemically and spectrally sensitized tabular grain emulsion is disclosed including tabular grains (a) having major faces, (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (f) exhibiting an average thickness in the range of from less than 0.3 .mu.m to at least 0.07 .mu.m.Type: GrantFiled: May 15, 1995Date of Patent: November 12, 1996Assignee: Eastman Kodak CompanyInventors: Richard L. Daubendiek, Joseph C. Deaton, Donald L. Black, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Xin Wen, Robert D. Wilson
-
Patent number: 5536632Abstract: A chemically and spectrally sensitized ultrathin tabular grain emulsion is disclosed including tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (e) exhibiting an average thickness of less than 0.07 .mu.m.Improved sensitivity is observed when the surface chemical sensitization sites include silver halide protrusions of a face centered cubic crystal lattice structure forming epitaxial junctions with the tabular grains and having a higher overall solubility than at least that portion of the tabular grains forming epitaxial junctions with the protrusions and a sensitivity enhancing combination of dopants are contained in the silver halide grains including a first sensitivity enhancing dopant capable of providing shallow electron trapping sites and a second sensitivity enhancing selenium dopant.Type: GrantFiled: May 15, 1995Date of Patent: July 16, 1996Assignee: Eastman Kodak CompanyInventors: Xin Wen, Richard L. Daubendiek, Donald L. Black, Joseph C. Deaton, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Robert D. Wilson
-
Patent number: 5503970Abstract: A chemically and spectrally sensitized ultrathin tabular grain emulsion is disclosed including tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (e) exhibiting an average thickness of less than 0.07 .mu.m.It has been observed that increased speed and contrast as well as improvements in speed-granularity relationships can be realized when the surface chemical sensitization sites include epitaxially deposited silver halide protrusions forming epitaxial junctions with the tabular grains, the protrusions (a) being located on up to 50 percent of the surface area of the tabular grains, (b) having a higher overall solubility than at least that portion of the tabular grains forming epitaxial junctions with the protrusions, and (c) forming a face centered cubic crystal lattice.Type: GrantFiled: August 26, 1994Date of Patent: April 2, 1996Assignee: Eastman Kodak CompanyInventors: Myra T. Olm, Xin Wen, Richard L. Daubendiek, Donald L. Black, Joseph C. Deaton, Timothy R. Gersey, Joseph G. Lighthouse, Robert D. Wilson
-
Patent number: 5503971Abstract: An improved spectrally sensitized ultrathin tabular grain emulsion is disclosed in which tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, (e) exhibiting an average thickness of less than 0.07 .mu.m, and (f) having latent image forming chemical sensitization sites on the surfaces of the tabular grains, are spectrally sensitized. The speed-granularity relationship of the emulsion is improved by employing in forming the surface chemical sensitization sites at least one silver salt epitaxially located on tabular grain surface sites that contain increased iodide concentrations.Type: GrantFiled: August 26, 1994Date of Patent: April 2, 1996Assignee: Eastman Kodak CompanyInventors: Richard L. Daubendiek, Donald L. Black, Joseph C. Deaton, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Xin Wen, Robert D. Wilson
-
Patent number: 5494789Abstract: An improved spectrally sensitized ultrathin tabular grain emulsion is disclosed in which tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, (e) exhibiting an average thickness of less than 0.07 .mu.m, and (f) having latent image forming chemical sensitization sites on the surfaces of the tabular grains, are spectrally sensitized and improved by employing in forming the surface chemical sensitization sites at least one silver salt epitaxially located on the tabular grains.Type: GrantFiled: December 19, 1994Date of Patent: February 27, 1996Assignee: Eastman Kodak CompanyInventors: Richard L. Daubendiek, Donald L. Black, Joseph C. Deaton, Timothy R. Gersey, Joseph G. Lighthouse, Myra T. Olm, Xin Wen, Robert D. Wilson