← Back to Patent Explorer
US4678739A Expired / Lapsed US ⏱️ 0.0 years remaining

Image forming method including heating step

Assignee: Fujifilm Holdings Corp
•
Filing: 1985-12-18
•
Granted: 1987-07-07
•
Expires: 2005-12-18
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A method for forming an image which has a step of heating an image-forming material in the presence of a compound represented by formula (I), whereby unevenness of image density and increase in fog due to fluctuation of development temperature, which have so far been caused in heat-developable photosensitive materials, can be prevented from occurring: ##STR1## wherein R represents a hydrogen atom, or a group selected from a class consisting of groups represented by formulae (A) to (C) ##STR2## wherein R 11 and R 12 each represents a substituted or unsubstituted alkyl group, a cycloalkyl group, a substituted or unsubstituted alkenyl group, an aralkyl group, a substituted or unsubstituted aryl group, a heterocyclic group, an alkyloxy group, an aryloxy group, an alkylthio group, an arylthio group, or a substituted or unsubstituted amino group, or R 11 and R 12 combine with each other to form a 5- or 6-membered ring; Q represents a hydrogen atom, an alkyl group, or an aryl group; TIME represents a timing group; PUG represents a photographically useful agent moiety; n represents 0 or an integer; and Z represents atoms forming a benzene ring.

Inventors

  • 👤 Hiroshi Kitaguchi
  • 👤 Masashi Takeuchi
  • 👤 Kozo Sato
  • 👤 Masaaki Tsukase
  • 👤 Masatoshi Kato

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 06:35
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/40; G03C8/4013; G03C8/408; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158; Y10S430/16

Claims Analysis

Total Claims: 17
Claim 1
Independent Claim 173 words
A method for forming an image, comprising image-wise exposing an image-forming material comprising a light-sensitive silver halide layer and heating the image-forming material in the presence of a compound represented by formula (I) and a nucleophilic agent and/or a base: ##STR41## wherein R represents a hydrogen atom, or a group selected from a class consisting of groups represented by formulae (A) to (C) ##STR42## wherein R 11 and R 12 each represents a substituted or unsubstituted alkyl group, a cyloalkyl group, a substituted or unsubstituted alkenyl group, an aralkyl group, a substituted or unsubstituted aryl group, a heterocyclic group, an alkyloxy group, an aryloxy group, an alkylthio group, an arylthio group, or a substituted or unsubstituted amino group, or R 11 and R 12 combine with each other to form a 5- or 6-membered ring; Q represents a hydrogen atom, an alkyl group, or an aryl group; TIME represents a timing group; PUG represents a photographically useful agent moiety; n represents 0 or an integer; and Z represents atoms forming a benzene ring.
Claim 2
Independent Claim 173 words
A method for forming an image, comprising image-wise exposing an image-forming material comprising a light-sensitive silver halide layer and heating the image-forming material in the presence of a compound represented by formula (I) and a nucleophilic agent and/or a base: ##STR41## wherein R represents a hydrogen atom, or a group selected from a class consisting of groups represented by formulae (A) to (C) ##STR42## wherein R 11 and R 12 each represents a substituted or unsubstituted alkyl group, a cyloalkyl group, a substituted or unsubstituted alkenyl group, an aralkyl group, a substituted or unsubstituted aryl group, a heterocyclic group, an alkyloxy group, an aryloxy group, an alkylthio group, an arylthio group, or a substituted or unsubstituted amino group, or R 11 and R 12 combine with each other to form a 5- or 6-membered ring; Q represents a hydrogen atom, an alkyl group, or an aryl group; TIME represents a timing group; PUG represents a photographically useful agent moiety; n represents 0 or an integer; and Z represents atoms forming a benzene ring.
Claim 3
Dependent Claim 34 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents straight or branched chain alkyl group containing from 1 to 18 carbon atoms.
Claim 4
Dependent Claim 34 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents a 5- or 6-membered cycloalkyl group containing from 5 to 10 carbon atoms.
Claim 5
Dependent Claim 24 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents an alkenyl group.
Claim 6
Dependent Claim 24 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents an aralkyl group.
Claim 7
Dependent Claim 31 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents an aryl group containing from 6 to 18 carbon atoms.
Claim 8
Dependent Claim 35 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents a 5-or 6-membered heterocyclic ring containing oxygen, nitrogen, or sulfur as a hetero atom.
Claim 9
Dependent Claim 49 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents an alkyloxy or an aryloxy group represented by formula (D) --OR.sup.13 (D) wherein R 13 represents a substituted or unsubstituted alkyl group or substituted or unsubstituted aryl group.
Claim 10
Dependent Claim 48 words
A method for forming an image as in claim 1, wherein at least one of R 11 and R 12 represents an alkylthio or arylthio group represented by formula (E) --SR.sup.14 (E) wherein R 14 represents a substituted or unsubstituted alkyl group or substituted or unsubstituted aryl group.
Claim 11
Dependent Claim 28 words
A method for forming an image as in claim 1, wherein the step of heating is carried out at a temperature ranging from 80° C. to 250° C.
Claim 12
Dependent Claim 17 words
A method for forming an image as in claim 1, wherein --(PUG) is a development inhibitor-releasing group.
Claim 13
Dependent Claim 37 words
A method for forming an image as in claim 11, wherein the development inhibitor released by the development inhibitor-releasing group is represented by formula (II) ##STR43## wherein Y represents atoms forming a 5- or 6-membered heterocyclic ring.
Claim 14
Dependent Claim 36 words
A method for forming an image as in claim 12, wherein, in addition to the nitrogen atom N illustrated in formula (II), said heterocyclic ring contains a sulfur atom, an oxygen atom, or another nitrogen atom.
Claim 15
Dependent Claim 27 words
A method for forming an image as in claim 11, wherein said compound according to formula (I) is used in combination with a precursor of a base.
Claim 16
Dependent Claim 30 words
A method for forming an image as in claim 14, wherein the molar ratio of the base precursor to the compound represented by formula (I) ranges from 1/20 to 20/1.
Claim 17
Dependent Claim 30 words
A method for forming an image as in claim 14, wherein the molar ratio of the base precursor to the compound represented by formula (I) ranges from 1/5 to 5/1.

References Cited (Backward Citations)

US4416977A Cited
US4420554A Cited
US4503139A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-07-06 1991-01-05 1991-07-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-07-06 1995-01-05 1995-07-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-07-06 1999-01-05 1999-07-07 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag