US3930867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Macrocyclic polyamines as sensitizers for silver halide emulsions
Assignee: EIDP Inc
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Filing: 1974-01-07
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Granted: 1976-01-06
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Expires: 1994-01-07
Abstract
Abstract Photographic silver halide emulsions are prepared which have their sensitivity increased by the addition of at least one macrocyclic polyamine, a salt, or a metal chelate thereof, said macrocyclic polyamine having the formula --(NH -- (CH.sub.2).sub.n).sub.m -- Where m is 4-7 and each n is independently 2-5.
Inventors
- 👤 John H. Bigelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
41 words
A photographic colloid-silver halide emulsion containing a sensitizing amount of a chemical sensitizer or a salt or metal chelate thereof, said chemical sensitizer having the formula -- (NH -- (CH.sub.2).sub.n).sub.m -- where m is 4-7 and each n is independently 2-5.
Claim 2
Dependent Claim
41 words
A photographic colloid-silver halide emulsion containing a sensitizing amount of a chemical sensitizer or a salt or metal chelate thereof, said chemical sensitizer having the formula -- (NH -- (CH.sub.2).sub.n).sub.m -- where m is 4-7 and each n is independently 2-5.
Claim 3
Dependent Claim
20 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10-tetraazacyclododecane.
Claim 4
Dependent Claim
24 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula copper II chloride 1,4,7,10-tetraazacyclododedane chelate.
Claim 5
Dependent Claim
24 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula nickel II chloride 1,4,7,10-tetraazacyclododecane chelate.
Claim 6
Dependent Claim
24 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula iron III chloride 1,4,7,10-tetraazacyclododecane chelate.
Claim 7
Dependent Claim
24 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula thallium III nitrate 1,4,7,10-tetraazacyclododecane chelate.
Claim 8
Dependent Claim
24 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula rhodium III chloride 1,4,7,10-tetraazacyclododecane chelate.
Claim 9
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10-tetraazacyclododecane tetrahydrochloride.
Claim 10
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula isocyclam tetrahydrochloride.
Claim 11
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,8,11-tetraazacyclotetradecane tetrahydrochloride.
Claim 12
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10,13-pentaazacyclopentadecane pentahydrochloride.
Claim 13
Dependent Claim
22 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10,16-hexaazacyclooctadecane trisulfuric acid.
Claim 14
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,9,12,15,20-hexaazacyclodocosane hexahydrochloride.
Claim 15
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,13,16,19-hexaazacyclotetracosane hexahydrochloride.
Claim 16
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10,13,16-hexaazacyclooctadecane hexahydrochloride.
Claim 17
Dependent Claim
23 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10,13,16-hexaazacyclooctadecane copper chloride chelate.
Claim 18
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10-tetraazacyclotridecane tetradihydrosulfate.
Claim 19
Dependent Claim
21 words
An emulsion according to claim 1 wherein said chemical sensitizer or salt or metal chelate thereof has the formula 1,4,7,10,13,16,19-heptaazacycloheneicosane heptahydrochloride.
Claim 20
Dependent Claim
26 words
An emulsion according to claim 1 wherein the metal of the metal chelate is selected from the groups Ib, IIIa, and VIII of the Periodic Table.
Claim 21
Dependent Claim
18 words
An emulsion according to claim 19 wherein said metal is selected from iron, nickel, copper, rhodium and thallium.
Claim 22
Dependent Claim
17 words
A photographic element comprising a support bearing at least one layer of an emulsion of claim 1.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |