US5244994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleachable polymeric filter dyes
Assignee: Eastman Kodak Co
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Filing: 1992-03-20
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Granted: 1993-09-14
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Expires: 2012-03-20
Abstract
Abstract Rapidly processible and irreversibly bleachable polymeric filter dyes for photographic elements are provided wherein a benzoxazle styryl chromophore is covalently bonded to a copolymer, particularly a copolymer of methyl acrylate, methacrylic acid, and sulfoethylmethacrylate, as well as filter layers and photosensitive elements containing them.
Inventors
- 👤 Sharon S. Linehan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:21
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832; G03C1/835
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
31 words
An irreversibly bleachable polymeric filter dye for photographic elements comprising a polymer of methyl acrylate, methacrylic acid, methacrylate, acrylamide, methacrylamide, acrylate, or mixtures thereof covalently bonded to a benzoxazole styryl chromophore.
Claim 2
Dependent Claim
31 words
An irreversibly bleachable polymeric filter dye for photographic elements comprising a polymer of methyl acrylate, methacrylic acid, methacrylate, acrylamide, methacrylamide, acrylate, or mixtures thereof covalently bonded to a benzoxazole styryl chromophore.
Claim 3
Dependent Claim
24 words
The polymeric dye of claim 1 wherein the benzoxazle styryl chromophore is covalently bonded to a copolymer of methyl acrylate, methacrylic acid, and sulfoethylmethacrylate.
Claim 4
Dependent Claim
22 words
The polymeric dye of claim 2 containing from about 2 to about 5 mol percent of a covalently bonded benzoxazole styryl chromophore.
Claim 5
Dependent Claim
51 words
The polymeric dye of claim 2 containing methyl acrylate (C)/methacrylic acid (E)/2-sulfoethyl methacrylate (sodium salt) (D)/ 5-acrylamido-N-ethyl-2-(4-dimethylaminophenyl ethylidenyl) benzoxazolium p-toluene sulfonate (A) at mol ratios ranging from about 75 to 92 (C), from about 20 to 3 (E), from about 3 to 10 (D), and from about 2 to 5 (A).
Claim 6
Dependent Claim
31 words
The polymeric dye of claim 4 containing mol ratios ranging from about 85 to 90 (C), from about 5 to 10 (E), about 3 to 5 (D), and about 2 (A).
Claim 7
Dependent Claim
17 words
The polymeric dye of claim 5 containing C, E, D, and A at mol ratios of 90/5/3/2.
Claim 8
Dependent Claim
17 words
The polymeric dye of claim 5 containing C, E, D, and A at mol ratios of 85/10/3/2.
Claim 9
Dependent Claim
18 words
A polymeric dye of claim 2 which bleaches irreversibly in thirty seconds or less under sulfite developing conditions.
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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) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |