Patent US2932156A successfully refreshed from Google Patents.
Patent US3901711A successfully refreshed from Google Patents.
US3901711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic emulsion containing a gold salt and a polyalkylene oxide
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1973-08-17
•
Granted: 1975-08-26
•
Expires: 1993-08-17
Abstract
Abstract The so-called high intensity reciprocity law failure of a silver halide photographic emulsion can be unexpectedly effectively prevented by adding to the silver halide photographic emulsion produced by the known method a gold salt and a polyalkylene oxide. The effect can be further improved by additionally adding thereto at least one compound selected from soluble salts of cadmium, zinc, cobalt, nickel, thallium, uranium, thorium, iridium, strontium and lead.
Inventors
- 👤 Katsuaki Iwaosa
- 👤 Seigo Ebato
- 👤 Noboru Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:40
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION SUITABLE FOR PREVENTING HIGH INTENSITY RECIPROCITY LAW FAILURE CONSISTING ESSENTIALLY OF SAID EMULSION AND EITHER (1) A GOLD SALT IN TERMS OF GOLD ATOMS OF 0.1 TO 200 MG PER MOLE OF THE SILVER HALIDE AND A POLYALKYLENE OXIDE OR CONDENSATION PRODUCT THEREOF WITH WATER, ALIPHATIC ALCOHOL, GLYCOL, FATTY ACID, ALIPHATIC AMINE, OR DEHYDRATED CYCLIC HEXITOL COMPOUNDS, THE AMOUNT OF POLYALKYLENE OXIDE OR CONDENSATION PRODUCT BEING 0.1 TO 50 GRAMS PER MOLE OF SILVA HALIDE OR (2) A MIXTURE OF (1) AND AT LEAST ONE SOLUBLE SALT SELECTED FROM THE GROUP CONSISTING OF HALIDE, NITRATE AND SULFATE SALTS OF CADMIUM, ZINC, COBALT, NICKEL, THALLIUM, URANIUM, THORIUM, IRIDIUM, STRONTIUM AND LEAD IN AN AMOUNT OF 10 MG TO 50 GRAMS PER MOLE OF THE SILVER HALIDE.
Claim 2
Dependent Claim
130 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION SUITABLE FOR PREVENTING HIGH INTENSITY RECIPROCITY LAW FAILURE CONSISTING ESSENTIALLY OF SAID EMULSION AND EITHER (1) A GOLD SALT IN TERMS OF GOLD ATOMS OF 0.1 TO 200 MG PER MOLE OF THE SILVER HALIDE AND A POLYALKYLENE OXIDE OR CONDENSATION PRODUCT THEREOF WITH WATER, ALIPHATIC ALCOHOL, GLYCOL, FATTY ACID, ALIPHATIC AMINE, OR DEHYDRATED CYCLIC HEXITOL COMPOUNDS, THE AMOUNT OF POLYALKYLENE OXIDE OR CONDENSATION PRODUCT BEING 0.1 TO 50 GRAMS PER MOLE OF SILVA HALIDE OR (2) A MIXTURE OF (1) AND AT LEAST ONE SOLUBLE SALT SELECTED FROM THE GROUP CONSISTING OF HALIDE, NITRATE AND SULFATE SALTS OF CADMIUM, ZINC, COBALT, NICKEL, THALLIUM, URANIUM, THORIUM, IRIDIUM, STRONTIUM AND LEAD IN AN AMOUNT OF 10 MG TO 50 GRAMS PER MOLE OF THE SILVER HALIDE.
Claim 3
Dependent Claim
24 words
A silver halide photographic emulsion according to claim 1, wherein the gold salt is selected from chloroauric acid, potassium auric thiocyanate and ammonium aurothiocyanate.
Claim 4
Dependent Claim
20 words
A silver halide photograhic emulsion according to claim 1, wherein the polyalkylene oxide or condensation product thereof is polyethylene oxide.
Claim 5
Dependent Claim
32 words
A silver halide emulsion according to claim 1 wherein the polyalkylene oxide or condensation product thereof is polyethylene oxide and the gold salt is chloroauric acid, potassium auric thiocyanate or ammonium aurothiocyanate.
Claim 6
Dependent Claim
12 words
A silver halide emulsion according to claim 1 wherein it includes (2).
Claim 7
Dependent Claim
23 words
A silver halide photograhic emulsion according to claim 5, wherein the soluble salt is halide, nitrate or sulfate of cobalt, nickel or zinc.
Claim 8
Dependent Claim
19 words
A silver halide emulsion according to claim 5 wherein the polyalkylene oxide or condensation product thereof is polyethylene oxide.
Claim 9
Independent Claim
114 words
A method for producing a silver halide photographic emulsion suitable for preventing high intensity reciprocity law failure which consists essentially of adding to a silver halide photographic emulsion either (1) a gold salt or (2) a mixture of (1) and at least one soluble salt selected from the group consisting of halide, nitrate and sulfate salts of cadmium, zinc, cobalt, nickel, thallium, uranium, thorium, iridium, strontium and lead at a stage ranging from emulsification to after completion of ripening and adding a polyalkylene oxide or condensation product thereof with water, aliphatic alcohol, glycol, fatty acid, aliphatic amine, or dehydrated cyclic hexitol compounds at a stage ranging from second ripening to after completion of ripening.
Claim 10
Independent Claim
114 words
A method for producing a silver halide photographic emulsion suitable for preventing high intensity reciprocity law failure which consists essentially of adding to a silver halide photographic emulsion either (1) a gold salt or (2) a mixture of (1) and at least one soluble salt selected from the group consisting of halide, nitrate and sulfate salts of cadmium, zinc, cobalt, nickel, thallium, uranium, thorium, iridium, strontium and lead at a stage ranging from emulsification to after completion of ripening and adding a polyalkylene oxide or condensation product thereof with water, aliphatic alcohol, glycol, fatty acid, aliphatic amine, or dehydrated cyclic hexitol compounds at a stage ranging from second ripening to after completion of ripening.
Claim 11
Dependent Claim
17 words
A method according to claim 8 wherein the polyalkylene oxide or condensation product thereof is polyethylene oxide.
Claim 12
Dependent Claim
11 words
A method according to claim 9 wherein there is added (2).
Claim 13
Dependent Claim
11 words
A method according to claim 8 wherein there is added (2).
References Cited (Backward Citations)
US2716062A
Cited
US2784091A
Cited
US2756147A
Cited
US2848330A
Cited
US3062647A
Cited
US3320068A
Cited
US3503749A
Cited
US3707376A
Cited
US3761266A
Cited
US3737313A
Cited
US3720516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |