US4912016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High contrast photographic recording material and emulsion and process for their development
Assignee: Eastman Kodak Co
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Filing: 1988-05-31
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Granted: 1990-03-27
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Expires: 2008-05-31
Abstract
Abstract A photographic recording material and emulsion are described which are capable of providing high contrast images. The recording material and emulsion comprises negative working silver halide and contrast enhancing arylhydrazide nucleating agents. A process for utilization of the elements and emulsions is also described.
Inventors
- 👤 Harold I. Machonkin
- 👤 Lee J. Fleckenstein
- 👤 Donald L. Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061; C; C07; C07C; C07C323/00; C07C323/50; C07C323/51; C07C323/60
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
48 words
A photographic recording material capable of providing a high contrast silver image which comprises a support having thereon a negative-working silver halide emulsion layer and a hydrazide compound having the following structural formula: ##STR10## wherein: R is alkyl having from 4 to about 8 carbon atoms or cyclohexyl.
Claim 2
Dependent Claim
48 words
A photographic recording material capable of providing a high contrast silver image which comprises a support having thereon a negative-working silver halide emulsion layer and a hydrazide compound having the following structural formula: ##STR10## wherein: R is alkyl having from 4 to about 8 carbon atoms or cyclohexyl.
Claim 3
Dependent Claim
15 words
The photographic recording material of claim 1 wherein R is a branched chain alkyl group.
Claim 4
Dependent Claim
31 words
The photographic recording material of claim 1 wherein the R alkyl or cyclohexyl group is substituted with halogen, amino, OH, SH or alkyl comprising from 1 to about 3 carbon atoms.
Claim 5
Dependent Claim
31 words
The photographic recording material of claim 1 wherein the hydrazide compound is present in an amount of from about 10 -4 to about 10 -1 mol thereof per mol of silver.
Claim 6
Dependent Claim
31 words
The photographic recording material of claim 4 wherein the hydrazide compound is present in an amount of from about 5×10 -4 to about 5×10 -2 mol thereof per mol of silver.
Claim 7
Dependent Claim
16 words
The photographic recording material of claim 1 wherein the hydrazide compound has the structural formula: ##STR11##
Claim 8
Dependent Claim
12 words
The photographic recording material of claim 1 having the structural formula: ##STR12##
Claim 9
Dependent Claim
12 words
The photographic recording material of claim 1 having the structural formula: ##STR13##
Claim 10
Dependent Claim
12 words
The photographic recording material of claim 1 having the structural formula: ##STR14##
Claim 11
Dependent Claim
33 words
A photographic emulsion comprising negative working silver halide and a hydrazide nucleating compound having the following structural formula: ##STR15## wherein: R is alkyl having from 4 to about 8 carbon atoms or cyclohexyl.
Claim 12
Dependent Claim
33 words
A photographic emulsion comprising negative working silver halide and a hydrazide nucleating compound having the following structural formula: ##STR15## wherein: R is alkyl having from 4 to about 8 carbon atoms or cyclohexyl.
Claim 13
Dependent Claim
14 words
The photographic emulsion of claim 10 wherein R is a branched chain alkyl group.
Claim 14
Dependent Claim
30 words
The photographic emulsion of claim 10 wherein the R alkyl or cyclohexyl group is substituted with halogen, amino, OH, SH or alkyl comprising from 1 to about 3 carbon atoms.
Claim 15
Dependent Claim
30 words
The photographic emulsion of claim 10 wherein the hydrazide compound is present in an amount of from about 10 -4 to about 10 -1 mol thereof per mol of silver.
Claim 16
Dependent Claim
30 words
The photographic emulsion of claim 13 wherein the hydrazide compound is present in an amount of from about 5×10 -4 to about 5×10 -2 mol thereof per mol of silver.
Claim 17
Dependent Claim
11 words
The photographic emulsion of claim 10 having the structural formula: ##STR16##
Claim 18
Dependent Claim
11 words
The photographic emulsion of claim 10 having the structural formula: ##STR17##
Claim 19
Dependent Claim
11 words
The photographic emulsion of claim 10 having the structural formula: ##STR18##
Claim 20
Dependent Claim
11 words
The photographic emulsion of claim 10 having the structural formula: ##STR19##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |