Patent US3793032A successfully refreshed from Google Patents.
US3793032A
Expired / Lapsed
US
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Coating aids for film-forming coating compositions
Assignee: Agfa Gevaert NV
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Filing: 1971-06-04
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Granted: 1974-02-19
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Expires: 1991-06-04
Abstract
Abstract WHEREIN: M stands for hydrogen, an alkali metal atom, ammonium or organic ammonium, N STANDS FOR 0 OR 1, R3 stands for hydrogen or when n 1 may be alkyl, and EACH OF R1 and R2 stands for a straight-chain or branched-chain alkyl group or together represent the atoms necessary to close an alicyclic ring structure, AND THE USE OF THE AFORESAID HYDROPHLIC COLLOIDS IN PHOTOGRAPHIC ELEMENTS ARE DESCRIBED. The coating compositions are excellent inexpensive synthetic coating aids in photographic elements. D R A W I N G Coating compositions comprising a hydrophilic colloid and at least one surface active compound corresponding to the formula:
Inventors
- 👤 R Pollet
- 👤 M Defre
- 👤 A Decat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:21
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0034; C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C321/00; C07C321/02; C07C321/04; C07C335/00; C07C335/30; C07C335/32; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
33 words
A photographic element comprising a support and one or more water-permeable colloid layers including light-sensitive silver halide emulsion layers wherein one or more of said layers comprise a compound corresponding to the formula:
Claim 2
Dependent Claim
31 words
A coating composition according to claim 1, wherein the said compound is present in an amount of from 0.01 to 5 percent by weight based on the weight of dry colloid.
Claim 3
Dependent Claim
13 words
A coating composition according to claim 1, wherein the hydrophilic colloid is gelatin.
Claim 4
Dependent Claim
39 words
A photographic element according to claim 2, wherein the said compound is present in the said layer in an amount of from 0.01 to 5 percent by weight based on the weight of dry colloid in the said layer.
Claim 5
Dependent Claim
13 words
A photographic element according to claim 5, wherein the said colloid is gelatin.
Claim 6
Dependent Claim
23 words
A photographic element according to claim 2, wherein the said colloid layer comprising the said compound is a light-sensitive silver halide emulsion layer.
Claim 7
Dependent Claim
29 words
A photographic element according to claim 2, wherein the said colloid layer comprising the said compound is a protective hydrophilic colloid layer coated over a silver halide emulsion layer.
Claim 8
Dependent Claim
14 words
The coating composition of claim 1 wherein the surface active compound is isooctadecyl sulfonate.
Claim 9
Dependent Claim
14 words
The coating composition of claim 1 wherein the surface active compound is isohexadecyl sulfonate.
Claim 10
Dependent Claim
12 words
The photographic element of claim 2 wherein said compound is osooctadecyl sulfonate.
Claim 11
Dependent Claim
12 words
The photographic element of claim 2 wherein said compound is isohexadecyl sulfonate.
References Cited (Backward Citations)
US2368287A
Cited
US2527260A
Cited
US2719087A
Cited
US3026202A
Cited
US3068101A
Cited
US3415649A
Cited
US3516835A
Cited
US3525620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |