Patent US2201195A successfully refreshed from Google Patents.
Patent US3876429A successfully refreshed from Google Patents.
US3876429A
Expired / Lapsed
US
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Basic mordants containing n-(3-dialkylamino-2-hydroxypropyl) succinimide
Assignee: Filmfabrik Wolfen VEB
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Filing: 1973-02-23
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Granted: 1975-04-08
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Expires: 1993-02-23
Abstract
Abstract Wherein m and n are integral numbers from 20 to 100 and m/(m+n) =0.3 to 0.5, R.sub.1 is a hydrogen atom or an alkyl group of up to 8 C atoms and R.sub.2 is an alkyl of up to 8 C atoms or an aryl group of 6 C atoms or R.sub.1 and R.sub.2 together with the N atom to which they are bonded constitute a N-containing heterocyclic ring having up to 5 C atoms in the ring, R.sub.3 is a hydrogen atom, an aryl of 6 C atoms or carboxyl group, and R.sub.4 is a hydrogen atom or an alkyl group of up to 4 C atoms. Polymeric basic mordants, particularly useful for acidsubstituted dyes in photographic elements, of the formula
Inventors
- 👤 Ernst-Joachim Poppe
- 👤 Gunther Bach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:57
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT AND HAVING A LAYER WHICH CONTAINS AN ACID-SUBSTITUTED COMPOUND MORDANTED BY A BASIC POLYMER, THE BASIC POLYMER CONTAINING 30% TO 50% N-(3-DIALKYLAMINO-2-HYDROXY-PROPYL) SUCCINIMIDE UNITS AND HAVING THE FORMULA
Claim 2
Dependent Claim
34 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT AND HAVING A LAYER WHICH CONTAINS AN ACID-SUBSTITUTED COMPOUND MORDANTED BY A BASIC POLYMER, THE BASIC POLYMER CONTAINING 30% TO 50% N-(3-DIALKYLAMINO-2-HYDROXY-PROPYL) SUCCINIMIDE UNITS AND HAVING THE FORMULA
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |