US3844788A
Expired / Lapsed
US
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Incorporation of sulfonyl derivatives of isothiourea in light-sensitive elements
Assignee: Eastman Kodak Co
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Filing: 1973-04-02
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Granted: 1974-10-29
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Expires: 1993-04-02
Abstract
Abstract Sulfonylalkyl or sulfonamidoalkyl isothiuronium compounds, incorporated in emulsions containing silver salts and processing chemicals, can be activated by immersion, heat or ammonia gas to form light-stable photographic images.
Inventors
- 👤 D Burness
- 👤 G Haist
- 👤 J King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:58
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/42; G03C5/00; G03C5/26; G03C5/38; G03C5/39; Y; Y10; Y10S; Y10S430/00; Y10S430/156
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
32 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A. A SILVER HALIDE PHOTOGRAPHIC EMULSION AND ASSOCIATED THEREWITH B. A STABILIZER PRECURSOR WHICH IS A SULFONYLALKYL OR SULFORNAMIDOALKYL ISOTHIURONIUM COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
32 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A. A SILVER HALIDE PHOTOGRAPHIC EMULSION AND ASSOCIATED THEREWITH B. A STABILIZER PRECURSOR WHICH IS A SULFONYLALKYL OR SULFORNAMIDOALKYL ISOTHIURONIUM COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
14 words
An element of claim 1 in which said isoThiuronium compound has the following formula:
Claim 4
Dependent Claim
13 words
An element of claim 1 in which said isothiuronium compound has the formula:
Claim 5
Dependent Claim
13 words
An element of claim 1 in which said isothiuronium compound has the formula:
Claim 6
Dependent Claim
14 words
An element as in claim 1 wherein said element contains an incorporated developing agent.
Claim 7
Dependent Claim
13 words
An element of claim 1 wherein said element contains a stabilization activator precursor.
Claim 8
Dependent Claim
17 words
An element of claim 1 wherein said stabilizer precursor is an isothiuronium compound represented by the formula:
Claim 9
Dependent Claim
17 words
An element of claim 1 wherein said stabilizer precursor is an isothiuronium compound represented by the formula:
Claim 10
Dependent Claim
18 words
An element as in claim 1 wherein said stabilizer precursor is an isothiuronium compound represented by the formula:
Claim 11
Dependent Claim
51 words
In a substantially dry stabilization process which comprises heating at a temperature above about 90*C an exposed photographic element comprising a. a silver halide photographic emulsion and associated therewith b. a stabilizer precursor, the improvement which comprises utilizing as said stabilizer precursor a sulfonalkyl or sulfoamidoalkyl isothiuronium compound having the formula:
Claim 12
Dependent Claim
51 words
In a substantially dry stabilization process which comprises heating at a temperature above about 90*C an exposed photographic element comprising a. a silver halide photographic emulsion and associated therewith b. a stabilizer precursor, the improvement which comprises utilizing as said stabilizer precursor a sulfonalkyl or sulfoamidoalkyl isothiuronium compound having the formula:
Claim 13
Dependent Claim
13 words
A process of claim 10 in which the isothiuronium compound has the formula:
Claim 14
Dependent Claim
13 words
A process of claim 10 in which the isothiuronium compound has the formula:
Claim 15
Dependent Claim
13 words
A process of claim 10 in which the isothiuronium compound has the formula:
Claim 16
Dependent Claim
14 words
A process as in claim 10 wherein said element contains an incorporated developing agent.
Claim 17
Dependent Claim
14 words
A process as in claim 10 wherein said element contains a stabilization activator precursor.
Claim 18
Dependent Claim
18 words
A process as in claim 10 wherein said stabilizer precursor is an isothiuronium compound represented by the formula:
Claim 19
Dependent Claim
18 words
A process as in claim 10 wherein said stabilizer precursor is an isothiuronium compound represented by the formula:
Claim 20
Dependent Claim
18 words
A process as in claim 10 wherein said stabilizer precursor is an isothiuronium compound represented by the formula:
Claim 21
Dependent Claim
21 words
A process as in claim 10 wherein said heating is carried out at temperatures of from about 90*C to about 260*C.
Claim 22
Dependent Claim
23 words
A process as in claim 10 wherein said heating is carried out for a period of from about 1 to about 20 seconds.
Claim 23
Dependent Claim
46 words
A process as in claim 10 wherein said heating is carried out at temperatures of from about 90*C to about 260*C for a period of from about 1 to about 20 seconds in the presence of a silver halide developing agent and a stabilization activator precursor.
Claim 24
Dependent Claim
57 words
A process as in claim 10 wherein said heating is carried out at temperatures of at least about 90*C for a period of from about 1 to about 20 seconds in the presence of a mixture of a hydroquinone developing agent, a 3-pyrazolidone developing agent, and a guanidinium organic acid salt, urea or galactonamide stabilization activator precursor.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |