Patent US5314798A successfully refreshed from Google Patents.
US5314798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iodide banded tabular grain emulsion
Assignee: Eastman Kodak Co
•
Filing: 1993-04-16
•
Granted: 1994-05-24
•
Expires: 2013-04-16
Abstract
Abstract A radiation sensitive emulsion is disclosed containing a high chloride {100} tabular grain population in which the tabular grains contain bands of higher iodide.
Inventors
- 👤 Thomas B. Brust
- 👤 Mark R. Mis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:03
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/0051; G03C1/0053; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/16; G03C1/18; G03C1/22; G03C1/035; G03C2001/03535; G03C2001/03558; G03C2200/00; G03C2200/01
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
99 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions and containing up to 30 percent of the silver in the tabular grain.
Claim 2
Dependent Claim
99 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions and containing up to 30 percent of the silver in the tabular grain.
Claim 3
Dependent Claim
18 words
A radiation sensitive emulsion according to claim 1 wherein the surrounding band forms an exterior tabular grain portion.
Claim 4
Dependent Claim
52 words
A radiation sensitive emulsion according to claim 1 wherein the core accounts for at least 5 percent of the total grain silver and the band contains sufficient iodide to increase the average iodide concentration of the grain to a level that exceeds that of the core by at least 0.1 mole percent.
Claim 5
Dependent Claim
22 words
A radiation sensitive emulsion according to claim 3 wherein the core accounts for at least 25 percent of the total grain silver.
Claim 6
Dependent Claim
38 words
A radiation sensitive emulsion according to claim 3 wherein the band contains sufficient iodide to increase the average iodide concentration of the grain to a level that exceeds that of the core by at least 0.2 mole percent.
Claim 7
Dependent Claim
23 words
A radiation sensitive emulsion according to claim 1 wherein the tabular grains account for at least 70 percent of total grain projected area.
Claim 8
Dependent Claim
23 words
A radiation sensitive emulsion according to claim 6 wherein the tabular grains account for at least 90 percent of total grain projected area.
Claim 9
Dependent Claim
100 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions and (4) each band is surrounded by a shell of lower iodide ion content.
Claim 10
Dependent Claim
100 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions and (4) each band is surrounded by a shell of lower iodide ion content.
Claim 11
Dependent Claim
131 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions; (4) the core accounts for at least 50 percent of the total grain silver; and (5) the band contains sufficient iodide to increase the average iodide concentration of the grain to a level that exceeds that of the core by at least 0.1 mole percent.
Claim 12
Dependent Claim
131 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions; (4) the core accounts for at least 50 percent of the total grain silver; and (5) the band contains sufficient iodide to increase the average iodide concentration of the grain to a level that exceeds that of the core by at least 0.1 mole percent.
Claim 13
Dependent Claim
128 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions; (4) the band accounts for up to 5 percent of silver; and (5) the band contains sufficient iodide to increase the average iodide concentration of the grain to a level that exceeds that of the core by at least 0.1 mole percent.
Claim 14
Dependent Claim
128 words
A radiation sensitive emulsion containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10 and (2) each having an aspect ratio of at least 2; wherein (3) each of the tabular grains is comprised of a core and a surrounding band containing a higher level of iodide ions; (4) the band accounts for up to 5 percent of silver; and (5) the band contains sufficient iodide to increase the average iodide concentration of the grain to a level that exceeds that of the core by at least 0.1 mole percent.
Claim 15
Dependent Claim
20 words
A radiation sensitive emulsion according to claim 10 wherein the band accounts for up to 2 percent of total silver.
References Cited (Backward Citations)
US4439520A
Cited
EP0534395A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |