Patents by Inventor Dietrich M. Fabricius
Dietrich M. Fabricius 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: 6861201Abstract: Novel photopolymer compositions are disclosed which contain dyes that absorb strongly in the near infrared (near IR) region of the electromagnetic spectrum. These dyes are useful as photosensitizers for initiating a variety of photoimaging and photopolymerization reactions. Imaging Media are disclosed herein which are sensitive in the near infrared (near IR) region of the electromagnetic spectrum and which can initiate polymerization of ethylenically unsaturated monomer components in negative-acting photopolymer systems and/or which can initiate conversion of a leuco dye to its corresponding colored dye form. These imaging media comprise either a near IR dye photochemical sensitizer, a hexaarylbiimidazole (HABI) photoinitiator, a chain transfer agent, and a photopolymerizable material or a near IR dye photochemical sensitizer, a hexaarylbiimidazole (HABI) photoinitiator, and a leuco dye.Type: GrantFiled: April 7, 2004Date of Patent: March 1, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Gregory C. Weed, Dietrich M. Fabricius
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Publication number: 20040191681Abstract: Novel photopolymer compositions are disclosed which contain dyes that absorb strongly in the near infrared (near IR) region of the electromagnetic spectrum. These dyes are useful as photosensitizers for initiating a variety of photoimaging and photopolymerization reactions. Imaging Media are disclosed herein which are sensitive in the near infrared (near IR) region of the electromagnetic spectrum and which can initiate polymerization of ethylenically unsaturated monomer components in negative-acting photopolymer systems and/or which can initiate conversion of a leuco dye to its corresponding colored dye form. These imaging media comprise either a near IR dye photochemical sensitizer, a hexaarylbiimidazole (HABI) photoinitiator, a chain transfer agent, and a photopolymerizable material or a near IR dye photochemical sensitizer, a hexaarylbiimidazole (HABI) photoinitiator, and a leuco dye.Type: ApplicationFiled: April 7, 2004Publication date: September 30, 2004Inventors: Gregory C. Weed, Dietrich M. Fabricius
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Publication number: 20020064728Abstract: Novel photopolymer compositions are disclosed which contain dyes that absorb strongly in the near infrared (near IR) region of the electromagnetic spectrum. These dyes are useful as photosensitizers for initiating a variety of photoimaging and photopolymerization reactions. Imaging Media are disclosed herein which are sensitive in the near infrared (near IR) region of the electromagnetic spectrum and which can initiate polymerization of ethylenically unsaturated monomer components in negative-acting photopolymer systems and/or which can initiate conversion of a leuco dye to its corresponding colored dye form. These imaging media comprise either a near IR dye photochemical sensitizer, a hexaarylbiimidazole (HABI) photoinitiator, a chain transfer agent, and a photopolymerizable material or a near IR dye photochemical sensitizer, a hexaarylbiimidazole (HABI) photoinitiator, and a leuco dye.Type: ApplicationFiled: February 2, 2001Publication date: May 30, 2002Inventors: Gregory C. Weed, Dietrich M. Fabricius
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Patent number: 5587482Abstract: The present invention is directed to a dye suitable for spectral sensitization of a photographic element. Specifically, the dye is a compound having the structure: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each independently represents H; halogen; alkyl of 1-6 carbons; aryl of 6-24 carbons; alkoxy of 1-6 carbons; carbonyl; or sulfonate; or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, or R.sup.3 and R.sup.4 taken together represent the atoms necessary to complete a six-membered carbocylic ring;R.sup.5 represents hydrogen, alkyl of 1-6 carbons or aryl of 6-24 carbons;R.sup.6, R.sup.7, and R.sup.8 independently represent alkyl 1-6 carbons; aryl of 6-24 carbons; or any pair of R.sup.6, R.sup.7 and R.sup.8 taken together represent a five- or six-member heterocyclic ring;X represents O, S, CH.dbd.CH, Se, Te or N--R.sup.10 ;Y represents O, S, or N--R.sup.9 ;Z represents O, S or Se;R.sup.9 represents alkyl of 1-6 carbons; or an aryl of 6-24 carbons;R.sup.Type: GrantFiled: March 7, 1996Date of Patent: December 24, 1996Assignee: Sterling Diagnostic Imaging, Inc.Inventors: Dietrich M. Fabricius, Ralf H. Harms, James J. Welter
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Patent number: 5576443Abstract: Disclosed is a novel near-infrared absorbing dye of formula: ##STR1## wherein X.sup.1, X.sup.2 independently represents --CR.sup.8 R.sup.9 --, --S--, --Se--, --NR.sup.10 --, --CH.dbd.CH-- or --O--;n is an integer of 2 or 3;R.sup.1 and R.sup.2 independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons;R.sup.3 represents a ring chosen from a set consisting of aryl, substituted aryl, and a heterocyclic ring of a type present in photographic emulsions;R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, R.sup.4 and R.sup.5 taken together or R.sup.6 and R.sup.7 taken together can represent atoms necessary to form a 5 or 6-membered aliphatic ring, an aromatic six-membered ring, an aromatic 10-membered ring, a substituted aromatic six-member ring or a substituted aromatic 10-member ring;R.sup.8, R.sup.Type: GrantFiled: March 30, 1995Date of Patent: November 19, 1996Assignee: Sterling Diagnostic Imaging, Inc.Inventors: Dietrich M. Fabricius, Gregory C. Weed
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Patent number: 5536626Abstract: A novel dye and photographic element comprising the dye are detailed. The dye is especially useful as an antihalation dye in a photographic element. A particularly preferred embodiment is provided in a photographic element comprising an absorbing amount of the dye: ##STR1## wherein X1, X2 independently represents --CR.sup.8 R.sup.9 --, --S--, --Se--, --NR.sup.10 --, --CH.dbd.CH-- or --O--;R.sup.1 and R.sup.2 independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons;R.sup.3 represents a ring chosen from the set consisting of aromatic ring of 6 or 10 carbons, substituted aromatic ring of 6 or 10 carbons, a heterocyclic ring and a substituted heterocyclic ring;R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons;R.sup.8, R.sup.9 independently represent alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, aromatic ring of 6 or 10 carbons, substituted aromatic ring of 6 or 10 carbons;R.sup.Type: GrantFiled: May 31, 1995Date of Patent: July 16, 1996Assignee: E. I. du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, Thomas Schelhorn
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Patent number: 5519145Abstract: A novel dye and photographic element comprising the dye are detailed. The dye is especially useful as an antihalation dye in a photographic element. A particularly preferred embodiment is provided in a photographic element comprising an absorbing amount of the dye: ##STR1## wherein X.sup.1, X.sup.2 independently represents --CR.sup.8 R.sup.9 --, --S--, --Se--, --NR.sup.10 --, --CH.dbd.CH-- or --O--;R.sup.1 and R.sup.2 independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons;R.sup.3 represents a ring chosen from the set consisting of aromatic ring of 6 or 10 carbons, substituted aromatic ring of 6 or 10 carbons, a heterocyclic ring and a substituted heterocyclic ring;R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons;R.sup.8, R.sup.9 independently represent alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, aromatic ring of 6 or 10 carbons, substituted aromatic ring of 6 or 10 carbons;R.sup.Type: GrantFiled: April 8, 1994Date of Patent: May 21, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, Thomas Schelhorn
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Patent number: 5440042Abstract: Disclosed is a novel near-infrared absorbing dye of formula: ##STR1## wherein X.sup.1, X.sup.2 independently represents --CR.sup.8 R.sup.9 --, --S--, --Se--, --NR.sup.10 --, --CH.dbd.CH-- or --O--;n is an integer of 2 or 3;R.sup.1 and R.sup.2 independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons;R.sup.3 represents a ring chosen from the set consisting of aryl, substituted aryl, and heterocyclic containing 5 or 6 carbons in the ring;R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, R.sup.4 and R.sup.5 taken together or R.sup.6 and R.sup.7 taken together may represent the atoms necessary to form a 5 or 6-membered aliphatic ring, an aromatic six-membered ring, an aromatic 10-membered ring, a substituted aromatic six-member ring or a substituted aromatic 10-member ring;R.sup.8, R.sup.Type: GrantFiled: May 26, 1993Date of Patent: August 8, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, Gregory C. Weed
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Patent number: 5409809Abstract: An improved stabilizer is provided with decreased fog and minimal loss of photographic speed. The stabilizers are represented byA-(Y).sub.n -Bwherein;n is 0 or 1;Y is --S--, --CH.sub.2 S--, or 2,6 disubstituted pyridine with the proviso that when Y is --CH.sub.2 S-- the substituent A is attached to the sulfur;when Y is --S-- or --CH.sub.2 S-- A is pyrimidine, tetrazole, benzoxazole, benzimidazole, benzothiazole, benzoselenazole, naphthoxazole, or ##STR1## B and E separately are phenyl substituted with at least one electron accepting group or pyridine substituted with at least one electron accepting group with the proviso that when Y is --S--CH.sub.2 -- A is not tetrazole when B is phenyl;when Y is 2,6 disubstituted pyridine A represents hydrogen, benzoxazole, benzimidazole, benzothiazole, benzselenazole, naphthoxazole;B represents benzoxazole, benzimidazole, benzothiazole, benzselenazole, naphthoxazole and with the provisio that when Y is S, A-(Y).sub.n -B is limited to specific components.Type: GrantFiled: April 6, 1994Date of Patent: April 25, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, Allan R. Schoenberg
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Patent number: 5397690Abstract: An improved dye class and preparation procedure therefore is provided. The dyes can be prepared from a Stenhouse salt which is economical and can be prepared from readily available reagents. The improved dye is particularly suited for use as an antihalation dye in photographic elements and does not impart deleterious properties thereto. These and other properties are provided in a dye represented by: ##STR1## wherein the constituents have defined values.Type: GrantFiled: March 16, 1994Date of Patent: March 14, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, Thomas Schelhorn
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Patent number: 5330884Abstract: Disclosed is a photographic element comprising an antihalation dye of formula: ##STR1## wherein X.sup.1, X.sup.2 independently represents --CR.sup.8 R.sup.9 --, --S--, --Se--, --NR.sup.10 --, --CH.dbd.CH-- or --O--;n is an integer of 2 or 3;R.sup.1 and R.sup.2 independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons;R.sup.3 represents a ring chosen from the set consisting of aryl, substituted aryl, and a heterocyclic ring;R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, R.sup.4 and R.sup.5 taken together or R.sup.6 and R.sup.7 taken together may represent the atoms necessary to form a 5 or 6-membered aliphatic ring, an aromatic six-membered ring, an aromatic 10-membered ring, a substituted aromatic six-member ring or a substituted aromatic 10-member ring;R.sup.8, R.sup.Type: GrantFiled: May 26, 1993Date of Patent: July 19, 1994Assignee: E. I. du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, Thomas Schelhorn
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Patent number: 5298658Abstract: A photographic element is detailed which provides for improved resolution by decreasing the blue and ultraviolet radiation typically associated with internal scatter and print-through. These and other improvements are provided in a photographic element comprising a support having thereon at least one hydrophilic colloid layer, and a radiation sensitive silver halide emulsion layer present as a portion of the colloid layer or in a separate layer wherein the emulsion contains a dye of the formula: ##STR1## wherein: A=counterion chosen from the set consisting of lithium, sodium, potassium, ammonium and alkylammonium andZ is a linking group.Type: GrantFiled: December 20, 1991Date of Patent: March 29, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Dietrich M. Fabricius
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Patent number: 5298378Abstract: A photographic element is detailed which provides for improved resolution by decreasing the blue and ultraviolet radiation typically associated with internal scatter and print-through. These and other improvements are provided in a photographic element comprising a support having thereon at least one hydrophilic colloid layer, wherein at least one said hydrophilic colloid layer comprises a radiation sensitive silver halide emulsion layer, at least one said hydrophilic colloid layer comprises a filter dye consisting essentially of a compound with generic formula: ##STR1## wherein: A represents a counterion chosen from the set consisting of lithium, sodium, potassium, ammonium and alkylammonium of 1 to 15 carbons;Z represents the atoms chosen from the group consisting of carbon, sulfur, nitrogen, oxygen and selenium necessary to form an optionally substituted ring.Type: GrantFiled: March 19, 1993Date of Patent: March 29, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Dietrich M. Fabricius
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Patent number: 5275928Abstract: A photographic element is described with improved speed in the blue and ultra-violet region of the electromagnetic spectrum. The spectral response of the photographic element is enhanced with at least one dye represented by ##STR1## wherein A.sub.1 and A.sub.2 are hydrogen or taken together represent X--CH.dbd., wherein X is hydrogen, alkyl or substituted alkyl, substituted or unsubstituted five-member heterocyclic ring, substituted or unsubstituted six-member heterocyclic ring, aryl or an aryl substituted by at least one element chosen from the group consisting of alkyl, halogen, aryl, carbonyl, alkoxy, sulfonate, carboxy or triflouralkyl; Y is alkyl, aryl or COR wherein R is OH, NR.sup.2 or OM.sup.+, wherein R2 is hydrogen, alkyl, substituted alkyl, aryl or substituted aryl; wherein M+ is HNR.sup.3.sub.3.sup.+ or a metal cation, wherein R3 is hydrogen, alkyl or substituted alkyl, aryl or substituted aryl; Z is hydrogen, alkyl, substituted alkyl, aryl or substituted aryl.Type: GrantFiled: November 27, 1991Date of Patent: January 4, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Dietrich M. Fabricius
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Patent number: 5169748Abstract: A high resolution radiography system is presented utilizing a an intensifying screen incorporating a UV emitting phosphor. The photographic element exhibits enhanced sensitivity to the emission of the phosphor and further comprises at least one compound selected from the group comprising: ##STR1## wherein R.sub.1 =substituted or unsubstituted aromatic ring; R.sub.2 =H, substituted or unsubstituted alkyl or substituted or unsubstituted aryl; R.sub.3 =an alkyl group, an aryl group, a COOR group wherein R is hydrogen, alkyl, aryl or an alkali metal cation, HNR4+ wherein R.sub.4 is alkyl, substituted alkyl or alkyaryl.Type: GrantFiled: November 7, 1991Date of Patent: December 8, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Bernard A. Apple, Dietrich M. Fabricius, Joseph T. Guy
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Patent number: 5164291Abstract: Sulfoalkyl substituted indolenine dyes that absorb infrared radiation and photosensitive elements containing said dyes are disclosed. These dyes are useful as antihalation dyes in infrared sensitive photographic elements which show dye low stain. These dyes are represented by the following structure: ##STR1## wherein X is F, Cl, or Br; R is a hydrocarbon moiety containing from two to about five carbon atoms; and Y is a cation. In a preferred embodiment X is Cl. In a more preferred embodiment R is --(CH.sub.2).sub.3 -- or --(CH.sub.2).sub.4 --.Type: GrantFiled: January 21, 1992Date of Patent: November 17, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Alden D. West, Dietrich M. Fabricius
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Patent number: 5108887Abstract: A special group of zeromethine dyess which are desensitizers for sherical grain emulsions but which J-aggregate on tabular grains is described. Tabular emulsions containing these dyes are particularly useful as X-ray elements since the maximum emission peak of the dyes present therein closely matches the ouput of intensifying screens used therewith.Type: GrantFiled: December 5, 1990Date of Patent: April 28, 1992Assignee: E. I. du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, James J. Welter
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Patent number: 5107063Abstract: Sulfoalkyl substituted indolenine dyes that absorb infrared radiation and photosensitive elements containing said dyes are disclosed. These dyes are useful as antihalation dyes in infrared sensitive photographic elements which show dye low stain. These dyes are represented by the following structure: ##STR1## wherein X is F, Cl, or Br; R is a hydrocarbon moiety containing from two to about five carbon atoms; and Y is a cation. In a preferred embodiment X is Cl. In a more preferred embodiment R is --(CH.sub.2).sub.3 -- or --(CH.sub.2).sub.4 --.Type: GrantFiled: October 31, 1990Date of Patent: April 21, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Alden D. West, Dietrich M. Fabricius
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Patent number: 5102781Abstract: Zeromethine blue spectral sensitizing dyes have found utility in emulsions made without tabular grains. These emulsions are particularly useful for exposure to a light source rich in blue emission and are especially useful in radiographic elements designed for exposure to intensifying screens having such emission.Type: GrantFiled: July 9, 1990Date of Patent: April 7, 1992Assignee: E. I. du Pont de Nemours and CompanyInventors: Dietrich M. Fabricius, Raymond J. LeStrange
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Patent number: RE36174Abstract: Disclosed is a photographic element comprising an antihalation dye of formula: ##STR1## whereinX.sup.1 .?.,.!. .Iadd.and .Iaddend.X.sup.2 independently represent.?.s.!. --CR.sup.8 R.sup.9 --, --S--, --Se--, --NR.sup.10 --, --CH.dbd.CH-- or --O--;n is an integer of 2 or 3;R.sup.1 and R.sup.2 independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons;R.sup.3 represents .?.a ring chosen from the set consisting of aryl, substituted aryl, and.!. a heterocyclic ring;R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons.?.,.!..Iadd.; or .Iaddend.R.sup.4 and R.sup.5 taken together or R.sup.6 and R.sup.7 taken together .?.may.!. represent the atoms necessary to form a 5 or 6-membered aliphatic ring, an aromatic six-membered ring, an aromatic 10-membered ring, a substituted aromatic .?.six-member.!. .Iadd.six-membered .Iaddend.ring or a substituted aromatic .?.10-member.!. .Iadd.10-membered .Iaddend.ring;R.sup.8 .?.Type: GrantFiled: May 1, 1997Date of Patent: March 30, 1999Assignee: Sterling Diagnostic Imaging, Inc.Inventors: Dietrich M. Fabricius, Thomas Schelhorn