Patents by Inventor Stefano Mana

Stefano Mana 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).

  • Light-sensitive photographic materials comprising tabular silver halide grains and azodicarbonamide derivatives
    Patent number: 5731141
    Abstract: The present invention describes a light-sensitive silver halide photographic material comprising a support and silver halide emulsion layer or layers, wherein at least one of said silver halide emulsion layers contains tabular silver halide grains having an average diameter to thickness ratio of at least 2:1 and at least one azodicarbonamide derivative.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: March 24, 1998
    Assignee: Imation Corp.
    Inventors: Isabella Cogliolo, Ivano Delprato, Luca Ceruti, Stefano Mana, Stefano Parodi
  • Post processing stabilization of photothermographic emulsions
    Patent number: 5681693
    Abstract: The addition of 3-substituted-5-mercapto-1H-tetrazoles to silver halide photothermographic emulsions improves the post-processing stability of the emulsion.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: October 28, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Massimo Bertoldi, Stefano Mana, Cristina Soncini
  • Silver halide photographic elements with infrared absorbing dyes
    Patent number: 5322768
    Abstract: An infrared sensitive silver halide photographic element which contains a dye represented by the following formula: ##STR1## wherein R.sub.1 and R.sub.2 each independently represent a sulfoalkyl or a sulfatoalkyl group having 2 to 4 carbon atoms, Q represents the atoms necessary to complete a 5- or 6-membered carbocyclic ring group, R.sub.3 represents an alkyl group, R.sub.4 represents an aryl group, X.sup.- represents an anion, n is an integer of 1 or 2, provided that that n is 1 when the dye forms an intramolecular salt, and Z.sub.1 and Z.sub.2 each independently represent the atoms necessary to complete an indole nucleus.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: June 21, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ivano Delprato, Stefano Mana, Antonio Luzzi
  • Silver halide photographic elements
    Patent number: 5290670
    Abstract: An infrared sensitive silver halide photographic element which contains an infrared-absorbing dye represented by the following formula ##STR1## wherein: R.sub.1 and R.sub.2 each independently represents a sulfoalkyl or a sulfatoalkyl group,Q represents the atoms necessary to complete a 5- to 6- membered carbocyclic ring,Z.sub.3 represents the atoms necessary to complete a 5-membered N-containing aromatic ring,X.sup.- represents an anion,n is an integer of 1 or 2, provided that n is 1 when the dye forms an intramolecular salt, andZ.sub.1 and Z.sub.2 each independently represents the atoms necessary to complete a substituted or unsubstituted indole nucleus.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: March 1, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ivano Delprato, Stefano Mana, Antonio Luzzi
  • Thermally developable photographic elements
    Patent number: 5281515
    Abstract: The addition of simple merocyanine spectral sensitizing dyes to silver halide photothermographic emulsions improves the stability of the emulsion during storage before heat processing.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: January 25, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ivano Delprato, Stefano Mana, Cristina Soncini