US5229248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic light sensitive material
Assignee: Konica Minolta Inc
•
Filing: 1991-08-13
•
Granted: 1993-07-20
•
Expires: 2011-08-13
Abstract
Abstract A silver halide photographic light-sensitive material is disclosed, which is capable of forming an extremely high contrast image with high dot quality and is inhibited in formation of pepper spots. The light-sensitive material comprises a support, and provided thereon, a photographic layer including a silver halide emulsion layer, wherein the pH value of the surface of said photographic layer is 5.9 or more and said emulsion layer or a layer adjacent to said emulsion layer contains a specified hydrazine compound, and an amine compound or a quaternary onium compound.
Inventors
- 👤 Takeshi Sanpei
- 👤 Kenji Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
1232 words
A high-contrast silver halide photographic light-sensitive material, comprising a support and at least one silver halide photographic emulsion layer on one side of said support, said silver halide photographic emulsion layer containing: (i) a hydrazine derivative of the Formula (A), (B) or (C): ##STR50## wherein A is an aryl group or a saturated or unsaturated heterocyclic group having a sulfur atom or an oxygen atom; n is 1 or 2; R 1 and R 2 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a saturated or unsaturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an alkynyloxy group, an aryloxy group or a heterocyclic-oxy group, provided that when n is 1, R 1 and R 2 may be bonded together to form a ring, and when n is 2, at least one of R 1 and R 2 is an alkenyl group, an alkynyl group, a saturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an aryloxy group or a heterocyclic-oxy group; ##STR51## wherein A is as defined above; and R 3 is an alkynyl group or a saturated heterocyclic group; ##STR52## wherein R 4 is an alkyl group, an aryl group or a saturated or unsaturated heterocyclic group; R 5 is a hydrogen atom or a blocking group selected from an alkyl group, an aryl group, a heterocyclic group, a group of the formula ##STR53## wherein R 11 and R 12 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group or an amino group, and R 11 and R 12 may form a ring together with the nitrogen atom, and a group of the formula --C--O--R 13 wherein R 13 is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group or an aryl group; and Ar is an arylene group or a saturated or unsaturated heterocyclic group; and (ii) a compound selected from amine compounds and quaternary onium salts of the Formula (I), (II), (III), (IV), (V-I), (V-II), (V-III), (VI-I), (VI-II), and (VI-III): ##STR54## wherein R 15 R 16 and R 17 each independently is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, and saturated and unsaturated heterocyclic groups, provided that R 15 , R 16 and R 17 are not all hydrogen atoms and two or three of R 15 , R 16 and R 17 may be bonded together to form a ring; ##STR55## wherein Q is a nitrogen atom or a phosphorus atom; R 21 , R 22 , R 23 and R 24 each independently is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, saturated and unsaturated heterocyclic, and amino groups, provided that R 21 , R 22 , R 23 and R 24 are not all hydrogen atoms and two or three of R 21 , R 22 , R 23 and R 24 may be bonded together to form a ring; and X - is an anion; ##STR56## wherein R 31 and R 32 each independently is an alkyl group and may be bonded together to form a ring; R 33 is an alkyl group, an aryl group, or a saturated or unsaturated heterocyclic group; A' is an alkylene group; Y is a --CONR 34 --, --OCONR 34 --, --NR 34 CONR 34 --, --NR 34 COO--, --COO--, --OCO--, --CO--, --OCOO--, --NR 34 CO 13 , --SO 2 NR 34 --, --NR 34 SO 2 --, NR 34 SO 2 NR 34 --, --SO 2 --, --S--, --O--, --NR 34 -- or --N═ group, wherein R 34 is a hydrogen atom or an alkyl group; ##STR57## wherein R 41 and R 42 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, and may be bonded together to form a ring; and E is a group containing a --(--CH 2 CH 2 O) n group, wherein n is an integer of 2 or more: ##STR58## wherein R 51 , R 52 and R 53 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, provided that at least one of R 51 , R 52 and R 53 is an alkenyl group or an alkynyl group or at least one of R 51 and R 52 is an aryl group or a saturated or unsaturated heterocyclic group, and R 51 , R 52 and R 53 may be bonded together to form a ring; and L is a linking group selected from groups of the formula A'--Y as defined in Formula (III) above; ##STR59## wherein R 54 , R 55 and R 57 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 54 and R 55 may be bonded together to form a ring; R 56 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and L is a linking group selected from --CO--, --COO--, --CONR 58 , --SO 2 -- and --SO 2 NR 58 -- groups, wherein R 58 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and m is 0 or 1; ##STR60## wherein R 58 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; R 59 is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; L is a linking group selected from groups of the formula Y as defined in Formula (III) above; ##STR61## is a nitrogen-containing heterocyclic group and may form a ring together with R 58 ; and n is 0 or 1; ##STR62## wherein R 61 and R 62 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; R 63 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, saturated and unsaturated heterocyclic, acyl, sulfonyl, oxycarbonyl and carbamoyl groups; R 64 is a group containing ##STR63## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more; and R 61 , R 62 , R 63 and R 64 may be bonded together to form a ring; ##STR64## wherein R 65 and R 66 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 65 and R 66 may be bonded together to form a ring; T is a group containing ##STR65## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more, provided that when R is a hydrogen atom, X is a sulfur atom or an NH group; p1 wherein the surface of said silver halide photographic emulsion layer has a pH within the range of 6.0 to 7.5.
Claim 2
Dependent Claim
1232 words
A high-contrast silver halide photographic light-sensitive material, comprising a support and at least one silver halide photographic emulsion layer on one side of said support, said silver halide photographic emulsion layer containing: (i) a hydrazine derivative of the Formula (A), (B) or (C): ##STR50## wherein A is an aryl group or a saturated or unsaturated heterocyclic group having a sulfur atom or an oxygen atom; n is 1 or 2; R 1 and R 2 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a saturated or unsaturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an alkynyloxy group, an aryloxy group or a heterocyclic-oxy group, provided that when n is 1, R 1 and R 2 may be bonded together to form a ring, and when n is 2, at least one of R 1 and R 2 is an alkenyl group, an alkynyl group, a saturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an aryloxy group or a heterocyclic-oxy group; ##STR51## wherein A is as defined above; and R 3 is an alkynyl group or a saturated heterocyclic group; ##STR52## wherein R 4 is an alkyl group, an aryl group or a saturated or unsaturated heterocyclic group; R 5 is a hydrogen atom or a blocking group selected from an alkyl group, an aryl group, a heterocyclic group, a group of the formula ##STR53## wherein R 11 and R 12 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group or an amino group, and R 11 and R 12 may form a ring together with the nitrogen atom, and a group of the formula --C--O--R 13 wherein R 13 is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group or an aryl group; and Ar is an arylene group or a saturated or unsaturated heterocyclic group; and (ii) a compound selected from amine compounds and quaternary onium salts of the Formula (I), (II), (III), (IV), (V-I), (V-II), (V-III), (VI-I), (VI-II), and (VI-III): ##STR54## wherein R 15 R 16 and R 17 each independently is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, and saturated and unsaturated heterocyclic groups, provided that R 15 , R 16 and R 17 are not all hydrogen atoms and two or three of R 15 , R 16 and R 17 may be bonded together to form a ring; ##STR55## wherein Q is a nitrogen atom or a phosphorus atom; R 21 , R 22 , R 23 and R 24 each independently is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, saturated and unsaturated heterocyclic, and amino groups, provided that R 21 , R 22 , R 23 and R 24 are not all hydrogen atoms and two or three of R 21 , R 22 , R 23 and R 24 may be bonded together to form a ring; and X - is an anion; ##STR56## wherein R 31 and R 32 each independently is an alkyl group and may be bonded together to form a ring; R 33 is an alkyl group, an aryl group, or a saturated or unsaturated heterocyclic group; A' is an alkylene group; Y is a --CONR 34 --, --OCONR 34 --, --NR 34 CONR 34 --, --NR 34 COO--, --COO--, --OCO--, --CO--, --OCOO--, --NR 34 CO 13 , --SO 2 NR 34 --, --NR 34 SO 2 --, NR 34 SO 2 NR 34 --, --SO 2 --, --S--, --O--, --NR 34 -- or --N═ group, wherein R 34 is a hydrogen atom or an alkyl group; ##STR57## wherein R 41 and R 42 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, and may be bonded together to form a ring; and E is a group containing a --(--CH 2 CH 2 O) n group, wherein n is an integer of 2 or more: ##STR58## wherein R 51 , R 52 and R 53 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, provided that at least one of R 51 , R 52 and R 53 is an alkenyl group or an alkynyl group or at least one of R 51 and R 52 is an aryl group or a saturated or unsaturated heterocyclic group, and R 51 , R 52 and R 53 may be bonded together to form a ring; and L is a linking group selected from groups of the formula A'--Y as defined in Formula (III) above; ##STR59## wherein R 54 , R 55 and R 57 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 54 and R 55 may be bonded together to form a ring; R 56 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and L is a linking group selected from --CO--, --COO--, --CONR 58 , --SO 2 -- and --SO 2 NR 58 -- groups, wherein R 58 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and m is 0 or 1; ##STR60## wherein R 58 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; R 59 is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; L is a linking group selected from groups of the formula Y as defined in Formula (III) above; ##STR61## is a nitrogen-containing heterocyclic group and may form a ring together with R 58 ; and n is 0 or 1; ##STR62## wherein R 61 and R 62 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; R 63 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, saturated and unsaturated heterocyclic, acyl, sulfonyl, oxycarbonyl and carbamoyl groups; R 64 is a group containing ##STR63## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more; and R 61 , R 62 , R 63 and R 64 may be bonded together to form a ring; ##STR64## wherein R 65 and R 66 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 65 and R 66 may be bonded together to form a ring; T is a group containing ##STR65## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more, provided that when R is a hydrogen atom, X is a sulfur atom or an NH group; p1 wherein the surface of said silver halide photographic emulsion layer has a pH within the range of 6.0 to 7.5.
Claim 3
Dependent Claim
26 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 1, wherein the pH of said surface is within the range of 6.1 to 6.5.
Claim 4
Dependent Claim
30 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 1, wherein the amine or quaternary onium compound is of the Formula (V-I), (V-II), (VI-III), (VI-I), (VI-II) or (VI-III).
Claim 5
Dependent Claim
28 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 3, wherein the amine or quaternary onium compound is of the Formula (V-I), (V-II), (VI-I), or (VI-II).
Claim 6
Dependent Claim
24 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 4, wherein the amine or quaternary onium compound is of the Formula (VI-II).
Claim 7
Dependent Claim
51 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 1, wherein said hydrazine derivative and said amine or quaternary onium compound are each present in an amount of from 5×10 -7 mol to 5×10 -1 mol per mol of silver halide present in the silver halide photographic emulsion layer.
Claim 8
Dependent Claim
37 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 6, wherein said amount is from 5×10 -6 mol to 1×10 -2 mol per mol of silver halide present in the silver halide photographic emulsion layer.
Claim 9
Dependent Claim
698 words
A high-contrast silver halide photographic light-sensitive material, comprising a support and at least one silver halide photographic emulsion layer on one side of said support, said silver halide photographic emulsion layer containing: (i) a hydrazine derivative of the Formula (A-1): ##STR66## wherein R 1 and R 2 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a saturated or unsaturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an alkynyloxy group, an aryloxy group or a heterocyclic-oxy group, provided that at least one of R 1 and R 2 is an alkenyl group, an alkynyl group, a saturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an aryloxy group or a heterocyclic-oxy group; R 14 is an alkyl group, an aryl group or a saturated or unsaturated heterocyclic group; and Ar is an arylene group or a saturated or unsaturated heterocyclic group; and (ii) a compound selected from amine compounds and quaternary onium salts of the Formulae (V-I), (V-II), (VI-I), and (VI-II): ##STR67## wherein R 51 R 52 and R 53 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, provided that at least one of R 51 , R 52 and R 53 is an alkenyl group or an alkynyl group or at least one of R 51 and R 52 is an aryl group or a saturated or unsaturated heterocyclic group, and R 51 , R 52 and R 53 may be bonded together to form a ring; and L is a linking group of the formula A'--Y, wherein A' is an alkylene group and Y is a --CONR 34 --, --OCONR 34 --, --NR 34 CONR 34 --, --NR 34 COO--, --COO--, --OCO--, --CO--, --OCOO--, --NR 34 CO 13 , --SO 2 NR 34 --, --NR 34 SO 2 --, --NR 34 SO 2 NR 34 --, --SO 2 --, --S--, --O--, --NR.sub. 34 -- or --N═ group; ##STR68## wherein R 54 , R 55 and R 57 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 54 and R 55 may be bonded together to form a ring; R 56 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and L is a linking group selected from --CO--, --COO--, --CONR 58 , --SO 2 -- and --SO 2 NR 58 -- groups, wherein R 58 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and m is 0 or 1; ##STR69## wherein R 61 and R 62 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; R 63 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, saturated and unsaturated heterocyclic, acyl, sulfonyl, oxycarbonyl and carbamoyl groups; R 64 is a group containing ##STR70## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more; and R 61 , R 62 , R 63 and R 64 may be bonded together to form a ring; ##STR71## wherein R 65 and R 66 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 65 and R 66 may be bonded together to form a ring; T is a group containing ##STR72## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more, provided that when R is a hydrogen atom, X is a sulfur atom or an NH group; wherein the surface of said silver halide photographic emulsion layer has a pH within the range of 6.0 to 7.5.
Claim 10
Dependent Claim
698 words
A high-contrast silver halide photographic light-sensitive material, comprising a support and at least one silver halide photographic emulsion layer on one side of said support, said silver halide photographic emulsion layer containing: (i) a hydrazine derivative of the Formula (A-1): ##STR66## wherein R 1 and R 2 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a saturated or unsaturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an alkynyloxy group, an aryloxy group or a heterocyclic-oxy group, provided that at least one of R 1 and R 2 is an alkenyl group, an alkynyl group, a saturated heterocyclic group, a hydroxy group, an alkoxy group, an alkenyloxy group, an aryloxy group or a heterocyclic-oxy group; R 14 is an alkyl group, an aryl group or a saturated or unsaturated heterocyclic group; and Ar is an arylene group or a saturated or unsaturated heterocyclic group; and (ii) a compound selected from amine compounds and quaternary onium salts of the Formulae (V-I), (V-II), (VI-I), and (VI-II): ##STR67## wherein R 51 R 52 and R 53 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, provided that at least one of R 51 , R 52 and R 53 is an alkenyl group or an alkynyl group or at least one of R 51 and R 52 is an aryl group or a saturated or unsaturated heterocyclic group, and R 51 , R 52 and R 53 may be bonded together to form a ring; and L is a linking group of the formula A'--Y, wherein A' is an alkylene group and Y is a --CONR 34 --, --OCONR 34 --, --NR 34 CONR 34 --, --NR 34 COO--, --COO--, --OCO--, --CO--, --OCOO--, --NR 34 CO 13 , --SO 2 NR 34 --, --NR 34 SO 2 --, --NR 34 SO 2 NR 34 --, --SO 2 --, --S--, --O--, --NR.sub. 34 -- or --N═ group; ##STR68## wherein R 54 , R 55 and R 57 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 54 and R 55 may be bonded together to form a ring; R 56 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and L is a linking group selected from --CO--, --COO--, --CONR 58 , --SO 2 -- and --SO 2 NR 58 -- groups, wherein R 58 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl and heterocyclic groups; and m is 0 or 1; ##STR69## wherein R 61 and R 62 each independently is an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; R 63 is a hydrogen atom or a substituent selected from alkyl, alkenyl, alkynyl, aryl, saturated and unsaturated heterocyclic, acyl, sulfonyl, oxycarbonyl and carbamoyl groups; R 64 is a group containing ##STR70## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more; and R 61 , R 62 , R 63 and R 64 may be bonded together to form a ring; ##STR71## wherein R 65 and R 66 each independently is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a saturated or unsaturated heterocyclic group, and R 65 and R 66 may be bonded together to form a ring; T is a group containing ##STR72## where R is a hydrogen atom or an alkyl group, X is an oxygen atom, a sulfur atom or an NH group, Y is a hydrogen atom or a hydroxy group, and n is an integer of 2 or more, provided that when R is a hydrogen atom, X is a sulfur atom or an NH group; wherein the surface of said silver halide photographic emulsion layer has a pH within the range of 6.0 to 7.5.
Claim 11
Dependent Claim
26 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 8, wherein the pH of said surface is within the range of 6.1 to 6.5.
Claim 12
Dependent Claim
24 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 9, wherein the amine or quaternary onium compound is of the Formula (VI-II).
Claim 13
Dependent Claim
51 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 10, wherein said hydrazine derivative and said amine or quaternary onium compound are each present in an amount of from 5×10 -7 mol to 5×10 -1 mol per mol of silver halide present in the silver halide photographic emulsion layer.
Claim 14
Dependent Claim
37 words
A high-contrast silver halide photographic light-sensitive material as recited in claim 11, wherein said amount is from 5×10 -6 mol to 1×10 -2 mol per mol of silver halide present in the silver halide photographic emulsion layer.
References Cited (Backward Citations)
DD204322A1
Cited
US4929535A
Cited
EP0196626A2
Cited
US4987052A
Cited
US4853312A
Cited
JPS62280733A
Cited
US5024932A
Cited
EP0324391A2
Cited
JPH028833A
Cited
JPH0267639A
Cited
US4975354A
Cited
JPH0324391A
Cited
US4988604A
Cited
US5041355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |