US4335201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic compositions and elements containing same
Assignee: Eastman Kodak Co
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Filing: 1980-11-24
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Granted: 1982-06-15
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Expires: 2000-11-24
Abstract
Abstract Photographic base elements and radiation-sensitive elements are protected against the adverse effects resulting from accumulation of static electrical charges by incorporating therein an antistatic layer. Such layer is prepared from a coating composition comprising a hydrophilic binder, an anionic fluorinated surfactant and an inorganic nitrate.
Inventors
- 👤 Donald N. Miller
- 👤 Richard A. Kydd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; Y; Y10; Y10S; Y10S260/00; Y10S260/15
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
36 words
A coating composition for use in forming an antistatic layer in a radiation sensitive element, said composition comprising an aqueous solution of: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 2
Dependent Claim
36 words
A coating composition for use in forming an antistatic layer in a radiation sensitive element, said composition comprising an aqueous solution of: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein said anionic fluorinated surfactant has the formula R--X wherein R is partly or wholly fluorinated hydrocarbon; and X is --SO 3 M, --OSO 3 M or --COOM wherein M is a monovalent cation.
Claim 4
Dependent Claim
19 words
The composition of claim 2 wherein R is partly or wholly fluorinated alkylene and X is --SO 3 M.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said nitrate is an alkali metal nitrate.
Claim 6
Dependent Claim
60 words
The composition of claim 1 wherein said anionic fluorinated surfactant is present in an amount in the range of from about 0.05 to about 5 percent, by weight, and said inorganic nitrate is present in an amount in the range of from about 5 to about 20 percent, by weight, both based on total dry solids content of said composition.
Claim 7
Dependent Claim
9 words
The coating composition of claim 1 additionally containing silica.
Claim 8
Dependent Claim
30 words
A photographic base element comprising a support coated with an antistatic layer, said antistatic layer comprising: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 9
Dependent Claim
30 words
A photographic base element comprising a support coated with an antistatic layer, said antistatic layer comprising: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 10
Dependent Claim
13 words
The base element of claim 7 wherein said support is a film support.
Claim 11
Dependent Claim
13 words
The base element of claim 7 wherein said support is a paper support.
Claim 12
Dependent Claim
14 words
The base element of claim 9 wherein said support is a polyolefin-coated paper support.
Claim 13
Dependent Claim
48 words
A radiation-sensitive element comprising: (1) a support, (2) a radiation-sensitive, image-forming layer on one side of said support; and (3) an antistatic layer on the other side of said support, said antistatic layer comprising: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 14
Dependent Claim
48 words
A radiation-sensitive element comprising: (1) a support, (2) a radiation-sensitive, image-forming layer on one side of said support; and (3) an antistatic layer on the other side of said support, said antistatic layer comprising: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 15
Dependent Claim
14 words
The radiation-sensitive element of claim 11 wherein said support is a polyolefin-coated paper support.
Claim 16
Dependent Claim
18 words
The radiation-sensitive element of claim 11 wherein said radiation-sensitive, image-forming layer is a photosensitive silver halide emulsion layer.
Claim 17
Dependent Claim
40 words
The radiation-sensitive element of claim 11 wherein said anionic fluorinated surfactant has the formula R--X wherein R is partly or wholly fluorinated alkylene; and X is --SO 3 M, --OSO 3 M or --COOM wherein M is a monovalent cation.
Claim 18
Dependent Claim
23 words
The radiation-sensitive element of claim 14 wherein said anionic fluorinated surfactant has the formula CF 3 (CF 2 ) 7 SO 3 M.
Claim 19
Dependent Claim
15 words
The radiation-sensitive element of claim 11 wherein said inorganic nitrate is an alkali metal nitrate.
Claim 20
Dependent Claim
13 words
The radiation-sensitive element of claim 16 wherein said inorganic nitrate is sodium nitrate.
Claim 21
Independent Claim
47 words
A method of providing antistatic protection for a radiation sensitive element, which method comprises coating a surface of said element with an antistatic coating composition and drying said coating, said antistatic composition comprising: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 22
Independent Claim
47 words
A method of providing antistatic protection for a radiation sensitive element, which method comprises coating a surface of said element with an antistatic coating composition and drying said coating, said antistatic composition comprising: (a) a hydrophilic binder; (b) an anionic fluorinated surfactant; and (c) an inorganic nitrate.
Claim 23
Dependent Claim
64 words
A photographic element comprising: (1) a support; (2) a photosensitive image-forming layer on one side of said support; and (3) an antistatic layer on the other side of said support, said antistatic layer comprising: (a) gelatin; (b) an anionic fluorinated surfactant having the formula CF 3 (CF 2 ) 7 SO 3 M wherein M is a monovalent cation; and (c) an inorganic nitrate.
Claim 24
Dependent Claim
64 words
A photographic element comprising: (1) a support; (2) a photosensitive image-forming layer on one side of said support; and (3) an antistatic layer on the other side of said support, said antistatic layer comprising: (a) gelatin; (b) an anionic fluorinated surfactant having the formula CF 3 (CF 2 ) 7 SO 3 M wherein M is a monovalent cation; and (c) an inorganic nitrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |