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Patent US3758445A successfully refreshed from Google Patents.
US3758445A
Expired / Lapsed
US
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Novel polymers and photographic elements containing same
Assignee: Eastman Kodak Co
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Filing: 1970-12-21
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Granted: 1973-09-11
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Expires: 1990-12-21
Abstract
Abstract POLYMERS COMPRISING QUATERNARY NITROGEN ATOMS AND AT LEAST TWO AROMATIC NUCLEI IN THE POLYMER CATION FOR EACH QUANTERNARY NITROGEN ATOM ARE DESCRIBED. IN ONE EMBODIMENT AT LEAST 1/3 OF THE UNITS OF SAID POLYMER COMPRISE QUATERNARY NITROGEN ATOMS. IN ANOTHER EMBODIMENT POLYMERS COMPRISING AT LEAST TWO AROMATIC NUCLEI IN THE POLYMER CATION, SUCH AS ARYL GROUPS, FOR EACH QUATERNARY NITROGEN ATOM CAN BE USED IN PHOTOGRAPHIC ELEMENTS TO PROVIDE EXCELLENT MORDANTS FOR DYES.
Inventors
- 👤 L Minsk
- 👤 H Cohen
- 👤 J King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:09
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; G03C8/56; C; C08; C08F; C08F8/00; C08F8/44; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C7/00; G03C7/22; G03C7/25; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |