US3706562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic materials and processes for developing photographic compositions
Assignee: Eastman Kodak Co
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Filing: 1971-04-26
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Granted: 1972-12-19
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Expires: 1991-04-26
Abstract
Abstract PHOTOGRAPHIC COMPOSITIONS AND ELEMENTS COMPRISING A ZWITTERIONIC COMPOUND AND A CATIONIC AND/OR A NONIONIC DEVELOPMENT MODIFIER. IN ONE ASPECT, THIS INVENTION RELATES TO A PRCESS COMPRISING DEVELOPING A PHOTOGRAPHIC IMAGE IN THE PRESENCE OF A ZWITTERIONIC COMPOUND AND A CATIONIC OR A NON-IONIC DEVELOPMENT MODIFIER. IN ANOTHER ASPECT, THIS INVENTION RELATES TO A PHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING A PHOTOGRAPHIC DEVELOPING AGENT, A ZWITTERIONIC COMPOUND, AND A CATIONIC OR A NONIONIC DEVELOPMENT MODIFIER.
Inventors
- 👤 Arthur H Herz
- 👤 Donald M Burness
- 👤 Edward J Seus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/06; G03C1/08; G03C1/10
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |