Filing Information

Inventor(s)	Wataru Satake ·
Assignee(s)	Konica Corporation ·  View assignee updates
Attorney/Agent(s)	Muserlian, Lucas and Mercanti ·
Primary Examiner	Hoa Van Le ·
Application Number	US10606490
Filing date	06/26/2003
Issue date	05/31/2005
Prior Publication Data	US20040067458 - 04/08/2004
Predicted expiration date	10/12/2023
Patent term adjustment	108
U.S. Classifications	430/466  · 430/492  · 430/491  · 430/486  ·
International Classifications	--
Kind Code	B2
International Classifications	430466 · 430486 · 430491 · 430492 ·
Foreign Priority	JP2002232569 - 08/09/2002 ·

Patent Family

Abstract

A one-part photographic developing concentrate comprising: (i) a paraphenylene diamine color developing agent; and (ii) a water-soluble organic solvent, wherein a molar ratio of sodium ion to potassium ion is at least 3, and a molar ratio of sulfate ion to carbonate ion is at least 0.25.

Independent Claims | See all claims (6)

1. 1. A one-part photographic developing concentrate comprising: (i) a paraphenylene diamine color developing agent; (ii) a water-soluble organic solvent; and (iii) sodium ions, potassium ions, sulfate ions and carbonate ions, wherein a molar ratio of sodium ion to potassium ion is at least 3, and a molar ratio of sulfate ion to carbonate ion is at least 0.25.
2. 4. A one-part photographic developing concentrate comprising: (i) a paraphenylene diamine color developing agent; and (ii) a water-soluble organic solvent, wherein a molar ratio of sodium ion to potassium ion is at least 3, and a molar ratio of sulfate ion to carbonate ion is at least 0.25; and wherein a compound represented by formulas (A-I) to (A-IV) is further contained: wherein A11, A12, A13 and A14, which may be the same or different , each represents —CH2OH, —PO3(M6) or —COOM7; M6 and M7 each represents a hydrogen atom, an ammonium group, an alkaline metal atom or an organic ammonium group; X represents an alkylene group having 2 to 6 carbon atoms or —(B1O)n—B2—; n represents an integer of 1 to 6; and B1 and B2, which may be the same or different , each represents an alkylene group having 1 to 5 carbon atoms, wherein A21, A22, A23 and A24, which may be the same or different, each represents —CH2OH, —COOM1 or —PO3(M2)2; M1 and M2 each represents a hydrogen atom, an ammonium group, an alkaline metal or an organic ammonium group; X1 represents a straight or branched alkylene group having 2 to 6 carbon atoms, a saturated or unsaturated organic group which forms a ring, or —(B11O)n5—B12—; n5 represents an integer of 1-6; B11 and B12, which may be the same or different, each represents an alkylene group having 1-5 carbon atoms; and n1, n2, n3 and n4, which may be the same or different, each represents an integer of not less than 1 and at least one of n1, n2, n3 and n4 is 2 or more, wherein A1, A2, A3 and A4, which may be the same or different, each represents a hydrogen atom, a hydroxyl group, —COOM3, —PO3(M4)2, —CH2COOM5, —CH2OH or a lower alkyl group, however, at least one of A1 to A4 represents —COOM3, —PO3(M4)2, or —COOM5; M1, M2, M3, M4, and M5 each represents a hydrogen atom, an ammonium group, an alkaline metal atom or an organic ammonium group; and n7 represents an integer of 0 to 2, wherein, A5, A6, A7, A8 and A9, which may be the same or different, each represents —COOM3 or —PO3M4M5; M3, M4 and M5, which may be the same or different, each represents a hydrogen atom or an alkaline metal atom; and n represents an integer of 1 or 2.