Patent US4539383A successfully refreshed from Google Patents.
US4539383A
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Temporary polymeric mordants containing acetoxybenzyl substituted quaternary ammonium groups
Assignee: Polaroid Corp
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Filing: 1983-12-20
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Granted: 1985-09-03
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Expires: 2003-12-20
Abstract
Abstract Polymeric mordants which are capable of converting to non-mordanting species in an alkaline environment are described. The mordants can be used in photographic elements to temporarily mordant a photographically useful dye material, such as a light-filter or anti-halation dye or a diffusion transfer image dye-providing material, and then release the dye material during processing of the element with an alkaline processing composition.
Inventors
- 👤 Lloyd D. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:43
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C8/00; G03C8/42; G03C8/52; G03C8/56
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
A polymer comprising recurring units of the formula ##STR24## wherein R is hydrogen or lower alkyl; each of R 1 and R 2 is independently lower alkyl, cycloalkyl, substituted lower alkyl, aralkyl, or R 1 and R 2 taken together represent the atoms necessary to complete a saturated N-containing ring; L is a divalent linking group; A represents the atoms necessary to complete an arylene nucleus; R 3 is lower alkyl, aryl, aralkyl, alkoxy, or aryloxy; and X - is an anion; said polymer being capable of conversion in an alkaline environment to a polymer comprising recurring units of the formula ##STR25## wherein R, L, R 1 and R 2 are as previously defined.
Claim 2
Dependent Claim
114 words
A polymer comprising recurring units of the formula ##STR24## wherein R is hydrogen or lower alkyl; each of R 1 and R 2 is independently lower alkyl, cycloalkyl, substituted lower alkyl, aralkyl, or R 1 and R 2 taken together represent the atoms necessary to complete a saturated N-containing ring; L is a divalent linking group; A represents the atoms necessary to complete an arylene nucleus; R 3 is lower alkyl, aryl, aralkyl, alkoxy, or aryloxy; and X - is an anion; said polymer being capable of conversion in an alkaline environment to a polymer comprising recurring units of the formula ##STR25## wherein R, L, R 1 and R 2 are as previously defined.
Claim 3
Dependent Claim
16 words
A polymer of claim 1 wherein A represents the atoms necessary to complete a phenylene nucleus.
Claim 4
Dependent Claim
16 words
A polymer of claim 1 wherein each of R 1 and R 2 is lower alkyl.
Claim 5
Dependent Claim
15 words
A polymer of claim 3 wherein each of R 1 and R 2 is methyl.
Claim 6
Dependent Claim
28 words
A polymer of claim 1 wherein said divalent linking group L comprises a straight or branched alkylene group bonded to the quaternary nitrogen atom of said recurring units.
Claim 7
Dependent Claim
16 words
A polymer of claim 5 wherein said alkylene group comprises from 1 to 8 carbon atoms.
Claim 8
Dependent Claim
12 words
A polymer of claim 5 comprising recurring units of the formula ##STR26##
Claim 9
Dependent Claim
53 words
A polymer of claim 5 comprising recurring units of the formula ##STR27## wherein each of R 4 and R 5 is independently hydrogen; lower alkyl; substituted lower alkyl; alkaryl; aralkyl; cycloalkyl; or R 4 and R 5 together with the carbon atom to which they are bonded constitute a carbocyclic or heterocyclic ring.
Claim 10
Dependent Claim
16 words
A polymer of claim 8 wherein each of R 4 and R 5 is lower alkyl.
Claim 11
Dependent Claim
15 words
A polymer of claim 9 wherein each of R 4 and R 5 is methyl.
Claim 12
Dependent Claim
23 words
A polymer of claim 1 which is a copolymer comprising, as comonomeric units, two or more different recurring units of the said formula.
Claim 13
Dependent Claim
11 words
A polymer of claim 1 wherein R 3 is lower alkyl.
Claim 14
Dependent Claim
19 words
A polymer of claim 12 wherein R 3 is selected from the group consisting of methyl, isopropyl, and t-butyl.
Claim 15
Dependent Claim
15 words
A polymer of claim 1 further comprising recurring comonomeric units of an ethylenically unsaturated comonomer.
Claim 16
Dependent Claim
10 words
A polymer of claim 14 wherein said comonomer is acrylamide.
References Cited (Backward Citations)
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |